Well, I'm over the WOW factor of Vista and have just rolled back and installed Windows XP Pro. Vista was slow (even with 2Gb RAM), the graphics are irrelevant when you want to actually do work, IE7 froze a lot, Outlook 2007 froze a lot, a ROM upgrade to my O2 XDA Atom rooted my device so I had to roll back to XP to reinstall the ROM properly.
So all in all! I really can't see why you'd want to move to Vista! If you want a good looking OS buy a Mac, Vista is only half way there with this one! All for some security updates as far as I can see and some gadgets that you remove after the first week anyway!