Minor Correction - it needs to be running kernel 2.6.18 or later (They're on like 2.6.22 now). So you need to be running a recent version of Linux. I think Ubuntu 6.10 or 7.04 works, and the latest Fedora also does.
perhaps, but i'm glad to hear someone's running XP64 on their MP, as that's the version I hope to use for gaming and some audio work (just what I can't get done with OSX) after I get mine.