Since its inception, the Virtualization has definitely been a fantastic stuff for the Dev Community.
Nothing better than the fact that it allows you to separate out your environments without any extra hardware cost :).
Brilliant isn't it? I myself use quite a lot of virtual PCs for all the technologies that I work on.
So I can mess up however with my Biztalk 2006 Server and still my host OS - Win XP remains cool.
The best part thats now unveiled - MS Virtual PC is FREE
So just run to the Microsoft's virtual pc site and download your copy there.