diff --git a/core/src/main/java/org/jclouds/http/HttpRequestFilter.java b/core/src/main/java/org/jclouds/http/HttpRequestFilter.java
index 950796859d..149bd8e1c1 100644
--- a/core/src/main/java/org/jclouds/http/HttpRequestFilter.java
+++ b/core/src/main/java/org/jclouds/http/HttpRequestFilter.java
@@ -20,7 +20,14 @@ package org.jclouds.http;
 
 /**
  * // TODO: Adrian: Document this!
- * 
+ *
+ * NOTE: {@link #filter} must be idempotent in a sense that
+ * multiple calls to it with the same request yield in the
+ * same output.
+ * Example: this is required for request retrial
+ * ({@link org.jclouds.http.internal.BaseHttpCommandExecutorService},
+ * so that signatures can be updated.
+ *
  * @author Adrian Cole
  */
 public interface HttpRequestFilter {
diff --git a/gogrid/src/main/java/org/jclouds/gogrid/config/GoGridComputeServiceContextModule.java b/gogrid/src/main/java/org/jclouds/gogrid/config/GoGridComputeServiceContextModule.java
index 9ea215a9aa..1203753496 100644
--- a/gogrid/src/main/java/org/jclouds/gogrid/config/GoGridComputeServiceContextModule.java
+++ b/gogrid/src/main/java/org/jclouds/gogrid/config/GoGridComputeServiceContextModule.java
@@ -287,7 +287,7 @@ public class GoGridComputeServiceContextModule extends GoGridContextModule {
     * one can get with different instance types. The # of cores and disk sizes are purely empyrical
     * and aren't guaranteed. However, these are the matches found: Ram: 512MB, CPU: 1 core, HDD: 28
     * GB Ram: 1GB, CPU: 1 core, HDD: 57 GB Ram: 2GB, CPU: 1 core, HDD: 113 GB Ram: 4GB, CPU: 3
-    * cores, HDD: 233 GB Ram: 8GB, CPU: 6 cores, HDD: 462 GB
+    * cores, HDD: 233 GB Ram: 8GB, CPU: 6 cores, HDD: 462 GB (as of March 2010)
     * 
     * @return matched size
     */
diff --git a/gogrid/src/main/java/org/jclouds/gogrid/domain/Option.java b/gogrid/src/main/java/org/jclouds/gogrid/domain/Option.java
index cf79a208b1..28152c7b08 100644
--- a/gogrid/src/main/java/org/jclouds/gogrid/domain/Option.java
+++ b/gogrid/src/main/java/org/jclouds/gogrid/domain/Option.java
@@ -23,10 +23,12 @@
  */
 package org.jclouds.gogrid.domain;
 
+import com.google.common.primitives.Longs;
+
 /**
  * @author Oleksiy Yarmula
  */
-public class Option {
+public class Option implements Comparable<Option> {
 
     private Long id;
     private String name;
@@ -86,4 +88,9 @@ public class Option {
         result = 31 * result + (description != null ? description.hashCode() : 0);
         return result;
     }
+
+    @Override
+    public int compareTo(Option o) {
+        return Longs.compare(id, o.id);
+    }
 }
diff --git a/gogrid/src/main/java/org/jclouds/gogrid/filters/SharedKeyLiteAuthentication.java b/gogrid/src/main/java/org/jclouds/gogrid/filters/SharedKeyLiteAuthentication.java
index b3e0e2b1f6..24e646f2a6 100644
--- a/gogrid/src/main/java/org/jclouds/gogrid/filters/SharedKeyLiteAuthentication.java
+++ b/gogrid/src/main/java/org/jclouds/gogrid/filters/SharedKeyLiteAuthentication.java
@@ -23,7 +23,8 @@
  */
 package org.jclouds.gogrid.filters;
 
-import com.google.common.base.Throwables;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Multimap;
 import org.jclouds.Constants;
 import org.jclouds.date.TimeStamp;
 import org.jclouds.encryption.EncryptionService;
@@ -33,11 +34,14 @@ import org.jclouds.http.HttpRequestFilter;
 import org.jclouds.http.HttpUtils;
 import org.jclouds.logging.Logger;
 import org.jclouds.rest.internal.GeneratedHttpRequest;
+import org.jclouds.rest.internal.RestAnnotationProcessor;
 
 import javax.annotation.Resource;
 import javax.inject.Inject;
 import javax.inject.Named;
 
+import java.net.URI;
+
 import static com.google.common.base.Preconditions.checkArgument;
 import static com.google.common.base.Preconditions.checkNotNull;
 import static java.lang.String.format;
@@ -74,9 +78,18 @@ public class SharedKeyLiteAuthentication  implements HttpRequestFilter {
         String toSign = createStringToSign();
         String signatureMd5 = getMd5For(toSign);
 
-        generatedRequest.addQueryParam("sig", signatureMd5);
-        generatedRequest.addQueryParam("api_key", apiKey);
+        String query = request.getEndpoint().getQuery();
+        Multimap<String, String> decodedParams =
+                RestAnnotationProcessor.parseQueryToMap(query);
 
+        decodedParams.replaceValues("sig", ImmutableSet.of(signatureMd5));
+        decodedParams.replaceValues("api_key", ImmutableSet.of(apiKey));
+
+        String updatedQuery = RestAnnotationProcessor.makeQueryLine(decodedParams, null);
+        String requestBasePart = request.getEndpoint().toASCIIString();
+        String updatedEndpoint = requestBasePart.substring(0, requestBasePart.indexOf("?") + 1) + updatedQuery;
+        request.setEndpoint(URI.create(updatedEndpoint ));
+        
         HttpUtils.logRequest(signatureLog, request, "<<");
     }
 
diff --git a/gogrid/src/main/java/org/jclouds/gogrid/functions/ParseOptionsFromJsonResponse.java b/gogrid/src/main/java/org/jclouds/gogrid/functions/ParseOptionsFromJsonResponse.java
new file mode 100644
index 0000000000..6f83e9a915
--- /dev/null
+++ b/gogrid/src/main/java/org/jclouds/gogrid/functions/ParseOptionsFromJsonResponse.java
@@ -0,0 +1,61 @@
+/**
+ *
+ * Copyright (C) 2010 Cloud Conscious, LLC. <info@cloudconscious.com>
+ *
+ * ====================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ====================================================================
+ */
+package org.jclouds.gogrid.functions;
+
+import com.google.gson.Gson;
+import com.google.gson.reflect.TypeToken;
+import org.jclouds.gogrid.domain.LoadBalancer;
+import org.jclouds.gogrid.domain.Option;
+import org.jclouds.gogrid.domain.internal.GenericResponseContainer;
+import org.jclouds.http.functions.ParseJson;
+
+import javax.inject.Inject;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.UnsupportedEncodingException;
+import java.lang.reflect.Type;
+import java.util.SortedSet;
+
+/**
+ * Parses the list of generic options.
+ *
+ * GoGrid uses options as containers for
+ * id/name/description objects.
+ *
+ * @author Oleksiy Yarmula
+ */
+public class ParseOptionsFromJsonResponse extends ParseJson<SortedSet<Option>> {
+
+    @Inject
+    public ParseOptionsFromJsonResponse(Gson gson) {
+        super(gson);
+    }
+
+    public SortedSet<Option> apply(InputStream stream) {
+        Type setType = new TypeToken<GenericResponseContainer<Option>>() {
+        }.getType();
+        GenericResponseContainer<Option> response;
+        try {
+            response = gson.fromJson(new InputStreamReader(stream, "UTF-8"), setType);
+        } catch (UnsupportedEncodingException e) {
+            throw new RuntimeException("jclouds requires UTF-8 encoding", e);
+        }
+        return response.getList();
+    }
+}
diff --git a/gogrid/src/main/java/org/jclouds/gogrid/reference/GoGridQueryParams.java b/gogrid/src/main/java/org/jclouds/gogrid/reference/GoGridQueryParams.java
index 337168e34a..e2f22d0812 100644
--- a/gogrid/src/main/java/org/jclouds/gogrid/reference/GoGridQueryParams.java
+++ b/gogrid/src/main/java/org/jclouds/gogrid/reference/GoGridQueryParams.java
@@ -66,4 +66,6 @@ public interface GoGridQueryParams {
     public static final String IMAGE_STATE_KEY = "image.state";
     public static final String IMAGE_FRIENDLY_NAME_KEY = "friendlyName";
     public static final String IMAGE_DESCRIPTION_KEY = "description";
+
+    public static final String LOOKUP_LIST_KEY = "lookup";
 }
diff --git a/gogrid/src/main/java/org/jclouds/gogrid/services/GridIpAsyncClient.java b/gogrid/src/main/java/org/jclouds/gogrid/services/GridIpAsyncClient.java
index 050b6ff63d..7b738ba8bb 100644
--- a/gogrid/src/main/java/org/jclouds/gogrid/services/GridIpAsyncClient.java
+++ b/gogrid/src/main/java/org/jclouds/gogrid/services/GridIpAsyncClient.java
@@ -37,6 +37,7 @@ import java.util.Set;
 
 import static org.jclouds.gogrid.reference.GoGridHeaders.VERSION;
 import static org.jclouds.gogrid.reference.GoGridQueryParams.IP_STATE_KEY;
+import static org.jclouds.gogrid.reference.GoGridQueryParams.IP_TYPE_KEY;
 
 /**
  * @see org.jclouds.gogrid.services.GridImageClient
@@ -65,6 +66,16 @@ public interface GridIpAsyncClient {
     @QueryParams(keys = IP_STATE_KEY, values = "Unassigned")
     ListenableFuture<Set<Ip>> getUnassignedIpList();
 
+
+    /**
+    * @see org.jclouds.gogrid.services.GridIpClient#getUnassignedPublicIpList()
+    */
+    @GET
+    @ResponseParser(ParseIpListFromJsonResponse.class)
+    @Path("/grid/ip/list")
+    @QueryParams(keys = {IP_STATE_KEY, IP_TYPE_KEY}, values = {"Unassigned", "Public"})
+    ListenableFuture<Set<Ip>> getUnassignedPublicIpList();
+
     /**
     * @see org.jclouds.gogrid.services.GridIpClient#getAssignedIpList()
     */
diff --git a/gogrid/src/main/java/org/jclouds/gogrid/services/GridIpClient.java b/gogrid/src/main/java/org/jclouds/gogrid/services/GridIpClient.java
index 5bd8897db4..fb77be8492 100644
--- a/gogrid/src/main/java/org/jclouds/gogrid/services/GridIpClient.java
+++ b/gogrid/src/main/java/org/jclouds/gogrid/services/GridIpClient.java
@@ -40,13 +40,25 @@ public interface GridIpClient {
     Set<Ip> getIpList(GetIpListOptions... options);
 
     /**
-     * Returns the list of unassigned IPs
+     * Returns the list of unassigned IPs.
+     *
+     * NOTE: this returns both public and private IPs!
+     *
      * @return unassigned IPs
      */
     Set<Ip> getUnassignedIpList();
 
+    /**
+     * Returns the list of unassigned public IPs.
+     * @return unassigned public IPs
+     */
+    Set<Ip> getUnassignedPublicIpList();
+
     /**
      * Returns the list of assigned IPs
+     *
+     * NOTE: this returns both public and private IPs!
+     *
      * @return assigned IPs
      */
     Set<Ip> getAssignedIpList();
diff --git a/gogrid/src/main/java/org/jclouds/gogrid/services/GridServerAsyncClient.java b/gogrid/src/main/java/org/jclouds/gogrid/services/GridServerAsyncClient.java
index cbbc955224..4a6cfe1335 100644
--- a/gogrid/src/main/java/org/jclouds/gogrid/services/GridServerAsyncClient.java
+++ b/gogrid/src/main/java/org/jclouds/gogrid/services/GridServerAsyncClient.java
@@ -33,9 +33,11 @@ import org.jclouds.domain.Credentials;
 import org.jclouds.gogrid.GoGrid;
 import org.jclouds.gogrid.binders.BindIdsToQueryParams;
 import org.jclouds.gogrid.binders.BindNamesToQueryParams;
+import org.jclouds.gogrid.domain.Option;
 import org.jclouds.gogrid.domain.PowerCommand;
 import org.jclouds.gogrid.domain.Server;
 import org.jclouds.gogrid.filters.SharedKeyLiteAuthentication;
+import org.jclouds.gogrid.functions.ParseOptionsFromJsonResponse;
 import org.jclouds.gogrid.functions.ParseServerFromJsonResponse;
 import org.jclouds.gogrid.functions.ParseServerListFromJsonResponse;
 import org.jclouds.gogrid.functions.ParseServerNameToCredentialsMapFromJsonResponse;
@@ -132,6 +134,12 @@ public interface GridServerAsyncClient {
     @Path("/grid/server/delete")
     ListenableFuture<Server> deleteByName(@QueryParam(NAME_KEY) String name);
 
-
-
+    /**
+     * @see GridServerClient#getRamSizes
+     */
+    @GET
+    @ResponseParser(ParseOptionsFromJsonResponse.class)
+    @Path("/common/lookup/list")
+    @QueryParams(keys = LOOKUP_LIST_KEY, values = "server.ram")
+    ListenableFuture<Set<Option>> getRamSizes();
 }
diff --git a/gogrid/src/main/java/org/jclouds/gogrid/services/GridServerClient.java b/gogrid/src/main/java/org/jclouds/gogrid/services/GridServerClient.java
index c7e5d9363d..fee891dcf0 100644
--- a/gogrid/src/main/java/org/jclouds/gogrid/services/GridServerClient.java
+++ b/gogrid/src/main/java/org/jclouds/gogrid/services/GridServerClient.java
@@ -29,6 +29,7 @@ import java.util.concurrent.TimeUnit;
 
 import org.jclouds.concurrent.Timeout;
 import org.jclouds.domain.Credentials;
+import org.jclouds.gogrid.domain.Option;
 import org.jclouds.gogrid.domain.PowerCommand;
 import org.jclouds.gogrid.domain.Server;
 import org.jclouds.gogrid.options.AddServerOptions;
@@ -137,4 +138,16 @@ public interface GridServerClient {
      * @return server before the command is executed
      */
     Server deleteByName(String name);
+
+    /**
+     * Retrieves the list of supported RAM configurations.
+     * The objects will have RAM ID, name and description. In
+     * most cases, id or name will be used for {@link #addServer}.
+     * 
+     * To see how RAM maps to CPU and disk space (as of March 2010),
+     * see {@link org.jclouds.gogrid.config.GoGridComputeServiceContextModule#provideSizeToRam}.
+     *
+     * @return supported ram sizes
+     */
+    Set<Option> getRamSizes();
 }
diff --git a/gogrid/src/test/java/org/jclouds/gogrid/GoGridLiveTest.java b/gogrid/src/test/java/org/jclouds/gogrid/GoGridLiveTest.java
index 66f9f68ebe..0ced734269 100644
--- a/gogrid/src/test/java/org/jclouds/gogrid/GoGridLiveTest.java
+++ b/gogrid/src/test/java/org/jclouds/gogrid/GoGridLiveTest.java
@@ -96,12 +96,14 @@ public class GoGridLiveTest {
         final String nameOfServer = "Server" + String.valueOf(new Date().getTime()).substring(6);
         serversToDeleteAfterTheTests.add(nameOfServer);
 
-        Set<Ip> availableIps = client.getIpServices().getUnassignedIpList();
+        Set<Ip> availableIps = client.getIpServices().getUnassignedPublicIpList();
         Ip availableIp = Iterables.getLast(availableIps);
 
+        String ram = Iterables.get(client.getServerServices().getRamSizes(), 0).getName();
+
         Server createdServer = client.getServerServices().addServer(nameOfServer,
                 "GSI-f8979644-e646-4711-ad58-d98a5fa3612c",
-                "1",
+                ram,
                 availableIp.getIp());
         assertNotNull(createdServer);
         assert serverLatestJobCompleted.apply(createdServer);
@@ -147,11 +149,13 @@ public class GoGridLiveTest {
         final String nameOfServer = "Server" + String.valueOf(new Date().getTime()).substring(6);
         serversToDeleteAfterTheTests.add(nameOfServer);
 
-        Set<Ip> availableIps = client.getIpServices().getUnassignedIpList();
+        Set<Ip> availableIps = client.getIpServices().getUnassignedPublicIpList();
+
+        String ram = Iterables.get(client.getServerServices().getRamSizes(), 0).getName();
 
         Server createdServer = client.getServerServices().addServer(nameOfServer,
                 "GSI-f8979644-e646-4711-ad58-d98a5fa3612c",
-                "1",
+                ram,
                 Iterables.getLast(availableIps).getIp());
 
         assert serverLatestJobCompleted.apply(createdServer);
@@ -194,8 +198,7 @@ public class GoGridLiveTest {
         final String nameOfLoadBalancer = "LoadBalancer" + String.valueOf(new Date().getTime()).substring(6);
         loadBalancersToDeleteAfterTest.add(nameOfLoadBalancer);
 
-        GetIpListOptions ipOptions = new GetIpListOptions.Builder().unassignedPublicIps();
-        Set<Ip> availableIps = client.getIpServices().getIpList(ipOptions);
+        Set<Ip> availableIps = client.getIpServices().getUnassignedPublicIpList();
 
         if(availableIps.size() < 4) throw new SkipException("Not enough available IPs (4 needed) to run the test");
         Iterator<Ip> ipIterator = availableIps.iterator();
diff --git a/gogrid/src/test/java/org/jclouds/gogrid/services/GridJobAsyncClientTest.java b/gogrid/src/test/java/org/jclouds/gogrid/services/GridJobAsyncClientTest.java
index 6b6a4d1206..d4f1b0729d 100644
--- a/gogrid/src/test/java/org/jclouds/gogrid/services/GridJobAsyncClientTest.java
+++ b/gogrid/src/test/java/org/jclouds/gogrid/services/GridJobAsyncClientTest.java
@@ -84,6 +84,16 @@ public class GridJobAsyncClientTest extends RestClientTest<GridJobAsyncClient> {
         assertPayloadEquals(httpRequest, null);
     }
 
+    @Test
+    public void testGetJobListNoOptions() throws NoSuchMethodException, IOException {
+        Method method = GridJobAsyncClient.class.getMethod("getJobList", GetJobListOptions[].class);
+        GeneratedHttpRequest<GridJobAsyncClient> httpRequest = processor.createRequest(method);
+
+        assertRequestLineEquals(httpRequest,
+                "GET https://api.gogrid.com/api/grid/job/list?v=1.3 HTTP/1.1");
+        assertHeadersEqual(httpRequest, "");
+        assertPayloadEquals(httpRequest, null);
+    }
 
     @Test
     public void testGetJobsForServerName() throws NoSuchMethodException, IOException {
diff --git a/gogrid/src/test/java/org/jclouds/gogrid/services/GridServerAsyncClientTest.java b/gogrid/src/test/java/org/jclouds/gogrid/services/GridServerAsyncClientTest.java
index d578203f06..5d6b6ff8ac 100644
--- a/gogrid/src/test/java/org/jclouds/gogrid/services/GridServerAsyncClientTest.java
+++ b/gogrid/src/test/java/org/jclouds/gogrid/services/GridServerAsyncClientTest.java
@@ -54,6 +54,7 @@ import com.google.common.collect.Iterables;
 import org.jclouds.gogrid.GoGrid;
 import org.jclouds.gogrid.domain.PowerCommand;
 import org.jclouds.gogrid.filters.SharedKeyLiteAuthentication;
+import org.jclouds.gogrid.functions.ParseOptionsFromJsonResponse;
 import org.jclouds.gogrid.functions.ParseServerFromJsonResponse;
 import org.jclouds.gogrid.options.AddServerOptions;
 import org.jclouds.gogrid.options.GetServerListOptions;
@@ -280,6 +281,34 @@ public class GridServerAsyncClientTest extends RestClientTest<GridServerAsyncCli
     }
 
 
+    @Test
+    public void testGetRamSizes() throws NoSuchMethodException, IOException {
+        Method method = GridServerAsyncClient.class.getMethod("getRamSizes");
+        GeneratedHttpRequest<GridServerAsyncClient> httpRequest =
+                processor.createRequest(method);
+
+        assertRequestLineEquals(httpRequest,
+                "GET https://api.gogrid.com/api/common/lookup/list?v=1.3&lookup=server.ram " +
+                        "HTTP/1.1");
+        assertHeadersEqual(httpRequest, "");
+        assertPayloadEquals(httpRequest, null);
+
+        assertResponseParserClassEquals(method, httpRequest, ParseOptionsFromJsonResponse.class);
+        assertSaxResponseParserClassEquals(method, null);
+        assertExceptionParserClassEquals(method, null);
+
+        checkFilters(httpRequest);
+        Iterables.getOnlyElement(httpRequest.getFilters()).filter(httpRequest);
+
+        assertRequestLineEquals(httpRequest,
+                "GET https://api.gogrid.com/api/common/lookup/list?v=1.3&lookup=server.ram&" +
+                        "sig=3f446f171455fbb5574aecff4997b273&api_key=foo " +
+                        "HTTP/1.1");
+        assertHeadersEqual(httpRequest, "");
+        assertPayloadEquals(httpRequest, null);
+    }
+
+
     @Override
     protected void checkFilters(GeneratedHttpRequest<GridServerAsyncClient> httpMethod) {
         assertEquals(httpMethod.getFilters().size(), 1);