WCF RIA Services has been updated for Silverlight 4 and Visual Studio 2010. You can get the update from WCF RIA Services V1.0 for Silverlight 4 and Visual Studio 2010.

WCF RIA Services simplifies the traditional n-tier application pattern by bringing together the ASP.NET and Silverlight platforms. RIA Services provides a pattern to write application logic that runs on the mid-tier and controls access to data for queries, changes and custom operations. It also provides end-to-end support for common tasks such as data validation, authentication and roles by integrating with Silverlight components on the client and ASP.NET on the mid-tier.

Getting Started with RIA Services

• See RIA Services on MSDN.
• See WCF RIA Services in Silverlight.
• You can also get code samples from WCF RIA Services on Codeplex.
• Download, Participate On-Demand New Silverlight 4 Training Kit

Bruce D. Kyle
ISV Architect Evangelist | Microsoft Corporation