How's that PCI Radeon working for you? I'm thinking of asking Santa for a PCI Radeon Mac Edition (found one for $199 - $20 rebate) but don't know if I really need it... I play games a little -- Q3, Tony Hawk, UT, etc etc etc... and mainly do a lot of design work on my G4/400 PCI.
Did you notice a huge difference the minute you plugged it in, or are the benefits limited to certain activites (like 3D stuff -- I play games, but don't work in LightWave or Maya or anything like that)? Also -- does it work natively under OS X, or are there drivers I need to install? Can I just (oh, I hate using this phrase) plug-and-play with it?