I've been using the latest beta of Ubuntu 7.04 which is set to be the next major release on thursday. I downloaded the default Ubuntu, as I wasn't sure of the quality of Kubuntu yet. I have to say, I'm very impressed. Hardware support is getting even better, and the new restricted drivers manager makes it a doddle to install proprietary nvidia drivers. When I mean easy, I mean easy. And the thing is, it worked! I started with a 6.10 installation, and did a distribution upgrade as per the wiki and after 600mb was downloaded I had the new release beta. Overall, the quality is high. Wireless support is better than before. I've not tried 3D desktop yet, since I've been running a 15GB torrent over the last few days. I have not shut down the computer once during the many days, and it's been rock solid stable. So far so good .