Ten One Design released the Fling, a physical joystick for the iPad. If you like gaming on your iPad, this is certainly worth a look.
"The suctioned joystick is applied to your iPad screen for instant hardware control and acts as a physical directional pad for games like first-person shooters, side-scrollers and space shooters."
Read the full article at: http://www.tipb.com/2011/01/04/add-physical-joystick-ipad-fling-joystick/