Geek-Shooting Rubberband Machine Gun
It's the idea that counts. This geeky rubberband machine gun is pretty sweet looking... but I wish it had a little more force. The gun can very quickly shoot (200!) rubberbands, but it just tumbles those plastic cups over (see video below). Nonetheless, cool idea and cool design. Notably, the inventor is Japanese, the only country with a Rubber Band Gun Shooting Association (awesome).
From Crunch Gear: