I have an offer to trade my Rev. B 12" PowerBook (1 GHz) to a G4 iBook of one of the more recent revisions. However, I do light gaming and am concerned about how the ATI Mobility 9200 (32 MB RAM) stacks up to the GeForce FX5200 Go (32 MB). I'm not interested in knowing how the rest of the computers stack up to each other (I know enough to figure that out myself), but I'd like to know how the graphics cards perform. For your information, the most GPU-intensive games I play are Neverwinter Nights and SimCity 4. I play both at medium specs and am pleased with the results. I get about 25 FPS on NWN and the lag in SC4 doesn't bother me at those graphic levels.