I'd love to have OS4 on the iMac I just picked up locally for $40. BTW, it's a G3 350mhz, 512mb ram, 30gb drive, slot load cd-rom model. I got it to familiarize myself with OS X, so the speed doesn't concern me. But the idea of OS4 on it makes me giddy... too bad it's probably just another pipe dream. It's a shame, you can barely pick up a stock A500 for the same price I got the mac for.