Yes, this should be moved to the gaming forum.
Just so you know, my 1 GHz eMac (which has a Radeon 7500 similar to that in the iBook) was just acceptable for Medal of Honor. My brother's 867 MHz Quicksilver with a Radeon 9000 is a bit better but it's still choppy in places. I wouldn't buy it unless you can try it first, if I were you. It's also available for GameCube, and GameCubes are well under $100 now on eBay.