http://msdn.microsoft.com/en-us/library/ee707352(v=VS.91).aspx
Although the WCF RIA Services framework is intended primarily to be used with Silverlight clients, you can also use it with other clients, such as ASP.NET clients. This approach enables you to use the same middle-tier logic across different types of clients. However, client code is not automatically generated when you use non-Silverlight clients.