Just to point out that the Microsoft Virtual PC website has been given a nice update:
http://www.microsoft.com/windows/virtualpc/default.mspx
Microsoft have also published a new whitepaper on using Microsoft Virtual PC for development and debugging:
http://www.microsoft.com/windows/virtualpc/techinfo/debug.mspx
charles aunger / www.eknowlogy.com "server based computing solutions" windows 64 bit, softricity, ericom, as well as citrix