The Visual Studio 2010 and .NET Framework 4 Release Candidate (RC) is now available to MSDN subscribers from Monday, February 8th. The release will be made available to everyone else on February 10th. You can access the download files over here
You can also go through a series of Visual Studio 2010 Release Candidate Walkthroughs as well as check out the Visual Studio 2010 and .NET Framework 4 Training Kit - January Release
You can take a survey and let the team know about your experiences with this product.
Note: This release does not support Silverlight 4 development. Support for Silverlight 4 with the VS 2010 RC should be made available in the next SL4 code release.