I am typing this message from a Dell D600 laptop running Vista currently (12/20).
It is a little buggy still, I am looking forward to the next release in 06 to hopefully smooth out some of the explorer problems. Explorer crashed on me 4 times in the first hour I was using it this morning, normally when I am trying to either browse files or install from the network file server.
The supplemental driver pack and the normal XP drivers I use worked though, so hardware support was a breeze.