Guys wanna post your results here? I just ran it with Ubuntu 64bit, 9.10 on a Phenom II Quad with Radeon HD4870 (catalyst 10.2).
I only could get the 64bit version to run (probably for the best anyway). I had some interesting results. The first time I ran it, I got these results (1920 by 1080):
FPS: 36.3
Scores: 914
Min FPS: 14.4
Max FPS: 67.7
The second time, I got this:
FPS: 15.9
Scores: 399
Min FPS: 8.0
Max FPS: 44.3
What happened? Well, to be perfectly honest, I'm not sure. The first time and every time after the second time, I had no sound when running the demo. But, the second time, for some reason I had working audio. Also of note, the second time I ran it, the benchmark only recognized 512mb vram, whereas all other times, it recognized all 1024mb (but no sound). Some other interesting things were that wireframe mode doesn't work properly at all, and that fps takes a dive and gives graphical errors once AA is enabled.
Do bear in mind that using an HD 4870 means no tessellation, and replication was also disabled for some reason. Still, these are defintely the nicest graphics to ever grace the Linux platform, and really offer great promise! The default inclusion of a 64bit binary seems like a no brainer, but most developers chose not to do it for some reason?
Finally, "installation" was stupldly easy.