A bit OT, but I think it's relevant. There was a post a xlr8yourmac.com talking about the hardware square root function on the G5. The poster said that UT2k3 (and AA) will save 8% CPU on the G5 by using it. And the poster's name was Ryan. Isn't the main Mac UT2k3 developer named Ryan? If so, I think we may see a G5 optimized UT2k3 sometime.