I just finished setting up XP in Virtual PC and it is SO great. I have previously been using 2000 and it was as sluggish as a bitch. At first XP as only mildly better but then I stumbled across the eye candy settings and when I set it to "Optimise for performace" it started running faster than most PCs I use. I can now even do some tasks in Windows almost as fast as I do them on the mac and things like opening Menus I do even faster than I do them on Mac (remember, the eye candy, ie. shadowing ect., is off). My $0.02, XP is TOTALLY the way to go for VCP.