I've just published a some code samples that show how to build a Silverlight client for the OData Service for SQL Azure, and how to build a service that validates Secure Web Tokens (SWTs) issued by AppFabric Access Control. For more information about the client, see my earlier post about Silverlight Clients and AppFabric Access Control. To implement identity federation scenarios for the OData Service, see my earlier post and code sample that show how to use identity federation with Codename "Dallas".