Just what I’ve been looking for – a way to run Vista with XP versions as virtual machines in case it all goes Horribly Wrong. My desktop has been creaking along recently; it doesn't hibernate any more and it crashes from time to time. I was planning to drop in the big new hard drive and install a fresh version of XP Professional to see if it was a hardware or software problem (and run Home as a virtual machine for the Home testing I still need to do) but we went to New Zealand instead. Now I might do the same, but with Vista. I don't want Vista in a VM, though Parallels will do that too. I thought I'd have to wait for Virtual PC/Server to be Vista ready, which I'm sure it will be when Vista actually ships.