In case anyone isn't yet aware:

http://www.asp.net/downloads/3.5-sp1/

This includes the ADO.NET Entity Framework (including LINQ to Entities), ASP.NET Dynamic Data, ADO.NET Data Services, AJAX History, and several other goodies.

MVC apparently didn't make it, but should be coming pretty soon as a separate release...

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You can get MVC as a separate download.
http://haacked.com/archive/2008/08/1...ot-in-sp1.aspx

http://Professionalaspnet.com

Yes, that's the Preview 3 release, which has been out for two months now.