Although we have UT2003 working on Linux ages ago, in the form of a Gentoo LiveCD, I just got the demo working on my own Linux box. This may have been a mistake, because I think I've spent about 3 hours playing it tonight, when I should have been working on other stuff. Oh well.
I've been playing bomber run, which is lots of fun. I can beat the default bots pretty easilly now, so I guess I'll have to bump up the intellegence a bit and see what happens. It would be nice to play online too, but the demo doesn't see to work. Perhaps it's my firewall. When we played at the university last year it worked fine.
I got half life working again too. The OpenGL rendering messes with some of the textures, but it turns out that my machine is more than fast enough to play it at 1024x768 with software rendering.
So in short, this new mobo is pretty sweet. If I could play GTA III in Linux, I would be very happy. I don't think I even have enough HD space to install in though. According to transgaming, it works, so maybe I should give it a shot.