my computer is a 2x1.8GHz G5 tower, 1.5GB RAM (upgrading to 4GB soon). with TenFourFox, Adium, and a couple other low-power apps going, I can get through around 15 seconds of 720p video without any skipping or glitching. It's got the stock GeForce FX 5200 Ultra - is anyone else with G5's able to play 720p video clearly? Even if I need to quit everything else out. I have no oppositions to upgrading the video card, probably spending the money on a better AGP card and flashing it.