Best practices for Silverlight usage in a ASP.NET MVC application

What are the best practices for ASP.NET MVC and Silverlight usage in a web application? To be specific开发者_如何学Go which libraries/frameworks (like prism) should be used in order to make the application unit testable and develop rapid? How one should pass data to the silverlight part from asp.net mvc (binding if possible?) and vice verse (from asp.net to silverlight)?

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The Entity Framework with RIA services is made precisely for this purpose.

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I propose:

asp.net mvc as service layer silverlight as client linq2sql for datalayer nunit for testing