Do you spend a lot of time... on your knees? Hope those prayers are being answered, or it's back on your knees again. But don't worry, the cold floor's got nothing on you know that Vavolo's figured out a way to keep them warm. Forget leg warmers, knee pads,or knee-socks, because Warmmi USB knee pads hook up to your computer to heat those ugly things right up. For $20, you can officially call yourself the, uhm, trendiest geek in ...