<** warning braindump approaching **>.
My vista pain timeline...
Installed Vista 64 bit rc1
No sound
no wlan nic
no tvcard
no usb talky to ups
clean build of Vista 32bit Ultimate rc1
sound now !!
no wlan nic
no tvcard
no usb talky to ups
clean build Vista Business 32 bit
sound still works but..
still no wlan nic
no tvcard
no usb talky to ups
dlink dwl-g510 Wlan nic is allegedly on the M$ supported list but doesn't even get discovered even with any of the vast array of drivers I have tried.
tevion tvcard is an cheapo aldi job and although not on the supported list others have it working - not me
worked great under XP sp2
usb to ups comms not super important but would be nice.
The good...
super fast internet
fast startup/shutdown
very bling look and feel
fast searching, indexing is nice
no BSODs.....yet
the bad
Eats resources like a hunger crackho.
Had to up the ram from 512mb to 2gb to make it usable on an intel d820 2.8ghz dualcore system.
Only got lowley 64mb pci video so performance score sits at 1.0. as advertised (/warned) it needs grunty video (eg 256mb+ DDR2 PCI-e ) for all the extra vista bling. Turn all the bling off and it's usuable with povvo cards.
As far as M$ "changing their mind" woiuldn't think so. Vista will be the only OS on OEM desktop M$ boxes not too far down the track (weeks/months ?)
Gotchas
Friends have been caught using "almost legal backup software" being uninstalled by Bill's 1984ish legit-only software spyware. be warned. nothing to report on that front though...yet.
Last word
If it's got a "made for vista" sticker on it like your GF's potential lappie then it's supported by your OEM provider then go for it.. but make sure you have got $$$ to get 1 with enough grunt to make it worthwhile...all a big fat IMHO on that one.