Microsoft has released today the first CTP of the ADO.NET vNext with a preview build of the ADO.NET Entity Framework including samples and white papers. If you are running a 64-bit version of Windows XP or Windows Server 2003 this CTP might not work correctly. Also since this is a very early CTP install it in a virtual machine and don't mess up your production machine.
Download ADO.NET vNext August 2006 CTP
Cross-posted from
The .NET Aficionado