Using your iphone or ipod touch as a SNES or NES or Playstation controller. This is a really cool thing to do with your playstation psx emulator on mac osx!
simply download the free joypad app on your iphone or ipod touch
once you have the app you will need their joypad connect app for your mac.
once you have the app installed and running on your mac you can then use the joypad app as a wireless controller on your iphone to control your psx and snes emulators :D