To my surprise, I ordered a copy of Win 7 during that "preorder by July 11 at 50% off" sale Microsoft and many dealers were offering. I don't know if I'll actually install it. I don't use Windows much and for my limited use, XP is fine. I would put it on my Athlon 64 X2 desktop if I decide to install it. If I decide against it, I figure I can sell the unopened copy for more than I paid for it.
My Vista laptop developed a fatal hardware flaw, most likely the power system or motherboard. It's out of warranty, of course, so I doubt it would be worthwhile to pay someone to fix it.