@Arlen: It's the last version supported by Classic (Applications made with Mac OS 9 or earlier). The next version up is technically possible, but I'm not willing to give up Classic.
Wine isn't a good idea on my end (I'm guessing it's targeted towards Intel processors), especially if Wine is not an emulator. ^_^
I keep going on this computer because I am still reeled in to the 8/18/08 build of Schism Tracker. Although I'm not making any Flash games, I consider this computer to be a good measurement of just what happens if you play a game on a technially really low end computer. My own Nine Pixel Game, made with Stencyl, is actually lightning fast. ^_^