This gametrak seems interesting. This game controller comes in the form of a pair of fingerless gloves you strap on your arms. It only tracks the movements of the player's arms and hands.

Gametrak™ is a revolutionary new videogames control system and games, which captures your movements and puts YOU in the game! Unlike cameras, infra-red, RF systems or tilt technologies, Gametrak™ allows movement forwards and backwards as well as up, down, left and right. With Gametrak you can punch your opponents with your hands; sports games let you pick up and play using real golf clubs or tennis racquets – you can even bounce virtual basketballs!