Look's like the iCade already has competition on its way. Atari are now launching their own Joystick for Atari games, no more fiddling around on the touchscreen trying to use badly implemented control schemes.
http://www.discoverybaygames.com/appcessories/atari-arcade-duo-powered-joystick
http://www.discoverybaygames.com/appcessories/atari-arcade-duo-powered-joystick