AROS goal has always been to get it running on as much hardware as possible. Currently it run best on x86. I believe the PPC version has not been touched in awhile. Though I could be wrong.
That is good to know - for some reason I always thought that both AROS and Morph where only for PPC and never even considered searching to see if they where available for normal x86 PCs! I may consider installing it (if I manage) to see how it goes - although the lack of USB makes me wonder if there are many other things missing as well!