Gaming inputs for iPhone

Product idea: create an add-on to the iPhone that adds some gaming controls (like direction keys or a joystick. The iPhone as a gaming platform may not have been the original intention, but if you want to port over a bunch of cool FPS games then the device tilting just won't do as a viable input.

Deluxe idea - in addition to some kind of joystick functionality, add speakers and an extended battery to take advantage of the screen.

Yes, I am still trying to inspire someone to build another Atari Lynx around the iPhone's kickass screen and connectivity. I'll go one step further - build-in an emulator and include the entire catalog of Atari Lynx titles. :-) Here's what it could look like (artist's rendering, lol!):

Come on now, tell me you cannot see the iPhone sitting inside an enclosure like this, only much smaller...