Well, I'm running an overclocked Core2Duo, 2gb DDR2 800, 7200RPM SATA hdd, and QuartzExtreme and CoreImage w/ hardware acceleration on my x1950Pro. It's not slow by any means, the scrolling in Firefox and Safari looked noticeably less smooth (and enabling smooth scrolling in Firefox actually made it look worse).

Spaces/Expose worked exceptionally smooth. I'm still going to have another go with Keynote. The only bug that's killing me right now is that my hacked video driver doesn't remember screen rotation on my 2nd screen (runs 90 deg to the left in 768x1024 mode). It's nothing horrible, but I have to re-rotate at each reboot. I figure it's just useful to have a full working OS X install just in case I'll ever need it.

_ _ - - = = Pr3tty F1y = = - - _ _