I currently use the gba and psx emulators, one of the bonus features of the epic is an ability to handle pretty consistant emulation for psx games, and the full keypad, with a little tweaking with the mapping, can be configured to handle all but the most complex controll schemes.
Since the nes/snes/gen emulation has been done to death on the other slower droid forums, I would like to focus on higher end emulation, and particularly which games work best with psx4droid app on the epic.
Also some rom sites come with psx game archives in the bin/cue format, which is not yet supported, so certain rom downloads won't work. I have found that romulation.net to be a good source
