Just wanted to point out Virtual PC 2007 is now available on the Microsoft Beta website as a download. Head on over to connect.microsoft.com and you can dowload it and play with it.
I have it installed and I must say, it looks a lot like the old one, the differences are under the hood as opposed to cosmetic. I am going to try installing Windows Vista as a guest OS as I couldn’t get it to install correctly under Virtual PC 2004.