http://en.wikipedia.org/wiki/Mac_Mini
Was just reading that, i have had 6 Apple's in my stretch only one was a PPC though, and that was a 120mhz, back when dinosaurs invented lasers
, i did not have a chance to try out PPC arch, most of my installs on my macbooks were Intel based.
I am hoping that you have another USB adaptor, or can at least test this current one on a Windoz box and verify. I am at a bit off a loss with your situation and am starting to believe that it is hardware or driver issue.
Hehe was just having a laugh thinking about how nice it would be if i could setup my ipod with OpenBSD and try to create an access point
maybe one day Jobs will have the incentive to creep into that type of "market"