60Beat has debuted its new GamePad for the iPad, iPhone, and iPod touch. The GamePad is a hand-held game controller that connects to Apple’s portable devices via the headphone port, and offers dual analog joysticks, a d-pad, 10 action buttons, and three menu buttons. The device draws its power from the headphone port, and includes an audio splitter so users can continue to listen to audio via a set of headphones or external speakers with the…