Got a chance to play it on my friend's 2Ghz Athlon + GeForce Ti4400 + 1 GB RAM (dunno what speed). To my surprise it actually played fairly well. At 800x600 @ medium detail it ran fairly well, I'd say an average of 40 FPS walking around (if not more) and about 15-20 when actually fighting, or in more highly detailed areas. Strangely the game performance scales quite well. He was actually able to run it at 1024x768 ULTRA detail at about 10-15 FPS... playable perhaps but definitely runnable. Also, what's been said about the detail scaling is correct. At 800x600 the graphical difference was negligable. There were more jaggies for sure but it was still performing decently. Hope it comes to Mac soon!