Logitech, the peripheral manufacturer that's been feeding our PC gaming addiction with mice, keyboards, speakers, etc. since the mid-'80s has officially declared that it has shipped one billion mice. In honor of the momentous occasion, the company's sponsoring a contest -- follow the mouse on its journey via blog.logitech.com and guess its final destination. Guess correctly and you'll "win some great prizes."

We asked Logitech reps to shed more light on said prizes. In the meantime, you should check out this semi-amusing list of Logitech mice that never made it to market, which includes such rejects as a mouse with three scroll wheels, a mouse with a tiny joystick on top and a mouse with a laser pointer embedded in the front for impromptu presentations or -- more likely -- pissing off coworkers.