Yeah, probably the majority of my ummm..... freeish

software will be incompatible with vista.
I've been thinking of putting an installation of vista on a little 100 gig drive and having a bigger hard drive with a ubuntu or debian installation on one of my others in the new quad machine i'm going to finish in a few weeks. I haven't had the chance to really play with the new sp1 version of vista and see the main differences between it and xp.