I installed Windows Vista Beta 2 Yesterday, and it does look nice. On the other hand, it seems to have tried to update the Firmware on my SoundBlaster Live 24 Bit sound card, and now it is undetectable by my machine.
It is definitely not ready for public consumption! :)
Just for clarification, I unplugged my XP Drive, and installed on a raw 160gb drive. And now that I have unplugged the Vista drive and plugged my XP drive back in, after carefully checking that everything is tight and cozy, there is no device detected. Vista killed it!