I got Mac OS public beta on my imac g3 rev a, and I cannot find my usb when I plug it in... It worked in Mac OS 9, is this just a beta software thing, or something else?
If your USB worked in OS 9, then it isn't a hardware problem. It sounds like A.) the beta has a bug and needs to be updated or B.) it just didn't detect your USB correctly, which is unlikely. I would think it is a bug.