All you need to work with LINQ (Visual Studio 2008 and .NET 3.5) is now finalized!
The final release of Visual Studio 2008 Team Suite is now available for download for MSDN subscribers. Hopefully, all editions of VS 2008 will be released for everyone soon.
Update: As announced by Soma, the entire family of Visual Studio products (from the Express Editions to the Professional version to Visual Studio Team Suite) and .NET Framework 3.5 are available for immediate download for anyone. .NET Framework 3.5 includes .NET Framework 2.0 service pack 1 and .NET Framework 3.0 service pack 1.