yea ive got my ipaq 3970 running at 472mhz (off the 400mhz default) with 118fsb (off the 100mhz fsb default), although with the newer Xscale PXA255 Intel fixed their stupid retard performance problem by upping the FSB to 200...
anyway, if your pocketPC has the newer Xscale, and you overclock the bus to i think 220 or something most apps can handle, youll get some awesome performance...
I just saw someone mod their cradle by putting LEDs into the stylus holders, so if youve got some open spaces on the cradle theres an option too...