http://msdn.microsoft.com/subscriptions/downloads/
Post with links from Chris Sells here: http://www.sellsbrothers.com/news/showTopic.aspx?ixTopic=1428
The new Visual Studio 2005 Developer Center : http://lab.msdn.microsoft.com/vs2005/Default.aspx
Don’t forget that if you have a MSDN license, you can download the Virtual PC, and then install the Beta there.