I see a blogger called Cabel has installed Half Life 2 (a PC game) on his Mac after he installed XP using Apple’s new Boot Camp application - he has a video up of the game playing and it seems to go quite smoothly to my untrained eye.
Now the mac is a games machine as well as a way cool computer!
Now we too can have access to PC games and spyware/malware/rootkits with just a reboot.