I have 2 copies coming for me.
My desktop PC has a BFG 8800 in it. Everything I read about Vista tells me that it is going to be a bitch to get it installed on that machine.
The longer it takes them to ship it, the better the drivers will be.
Seriously, if I wasn't getting it for free I wouldn't be getting it.
There just isn't anything compelling about Vista.
I have a BFG 8800 in my comp (lifetime warranty!) and I run the 32 bit version of Vista.
The drivers for the 32 bit version really aren't that bad. I have no evil issues to report.
My understanding is the 64-bit drivers are shit.