I tried Pocket UAE on my Ipaq 5550 some month ago,to be near useable i had to overlock it with pocket hack master (from 400 to 530 mhz as far as I can remember) and use 11khz for the sound witch is uggly.
I was wondering if some pocketpc with processors running to 630 mhz were powerfull enough to run a full speed A500.