Just a heads up for anyone wondering (I was yesterday) Vista x64 works perfectly under bootcamp 1.2 on the xeon mac pros. Installed yesterday, couldn't take the 2gb ram limit in x86 XP anymore. I simply erased my old partition and created a new one with bootcamp. Then launched the x64 vista ultimate (retail disc) from bootcamp. Don't even bother making a driver disc. Figured I'd spend hours on drivers but everything worked perfect from the go execpt sound (easy to get realtek drivers). Nvidia has x64 drivers now too so I picked those up. My bluetooth keyboard also works. It's super fast on the mac pro and couldn't have been easier to set-up or activate......