I finally saw an excellent demonstration in earlier sessions about what REST is and why it's so good. Why Rest? Why ADO.NET Data Services Uses just HTTP for connections Uniform URL convention, very flexible URL syntax Multiple representations – use regular content-type negoation or JSON and Atom for full AtomPub support. Allows you to retrieve data with filtering, sorting, pagination, and it's filtering it on the server to reduce traffic. Once again he's starting in on examples in code, I like these kinds of presentations. ADO.NET services is nice to be able to generate the proxies to access data. Very important, you must access the data asynchronously. Demonstrating using REST with Silverlight for UI. We can use VS 2008 with ADO.NET Data Services v1.5 CTP2 and allows us to start using it with MOSS.