You can read more about the changes to the MSDN Visual Studio 2005 beta documentation site at http://msdn.microsoft.com/aboutmsdn/changes/msdn2/.

The Visual Studio 2005 beta documentation is available at http://msdn2.microsoft.com/library.

Don't forget to try the cool URL model, e.g. http://msdn2.microsoft.com/library/system.data

Enjoy!