The joystick is equipped with suction cups to snap to the tablet's screen and off you go. Interestingly, the material sticking to the surface of the iPad is conducive, thus similar to your fingers. In addition, the small size and translucent build of the joystick provide for as much free space on the screen as possible. At a price tag of $25 it would be affordable for most of the hungry iPad gamers. Thanks, Ten One Design, for allowing us to finally get physical. With gadgets that is.
source: Ten One Design via CrunchGear