VS 2010 / .NET 4 Beta 1 now generally available

Look here: http://msdn.microsoft.com/en-us/vstudio/dd582936.aspx

You can find documentation here: http://msdn.microsoft.com/en-us/library/bb386063(VS.100).aspx

The next release of ADO.NET Entity Framework (EF) will be numbered 4.0 to sync to the .NET version and will be part of .NET 4.0

You can see some screenshots here: http://blogs.lessthandot.com/index.php/DesktopDev/MSTech/visual-studio-2010-screenshots