For all who said that x64 Vegas Pro was for Vista only - I can verify that it installed with no issues on both my laptop and desktop running x64 XP Pro. It also boots extremely fast and edits HDV content from my HC7's no problem.
Good to know it works on XP 64-bit since I don't wont to touch vista with a 10 foot pole. I tried vegas on vista some time ago and render times took twice as long as with XP.