http://blogs.technet.com/matt_deacon/archive/2007/12/07/beta-3-of-the-ado-net-entity-framework.aspxThe Entity Framework Beta 3 runtime and the Entity Framework Tools CTP 2 that work with the RTM releases of Visual Studio 2008 and the .NET Framework 3.5 have just been released with a pile of new features this is definitely worth a detailed look anden-USCommunityServer 2.1 SP1 (Build: 61025.2)