Windows Vista Beta 2 is now available for IT professionals and developers with MSDN and TechNet subscriptions. In the coming weeks, Microsoft will start the Windows Vista Customer Preview Program (CPP) for developers and IT professionals who are not members of the subscription services.
The Windows Vista CPP will also be available to technology enthusiasts that want to install and test a copy of Windows Vista Beta 2. You can get a head start on your Windows Vista CPP preparation by visiting the Get Ready section of this site and downloading the Windows Vista Product Guide (60 MB Word doc).
More information is available @ http://www.microsoft.com/windowsvista/