Dreamscene is great. It's about the only cool thing in Vista so far. Otherwise, it's a buggy, pop-up box ridden mess.
As an IT guy, I refuse to put it on any computer I need to support (except my own) for at least a year, probably two.
But Dreamscene is the shit. However, the fact that every edition of Windows is not "Ultimate" edition is..... faggotry.