Warm hands by blowing into gloves

Gorgonz's Exhale Heating System is based on the way people blow into their hands to warm them up. You breathe into the valve on the back of the glove and the hot air is circulated around your fingers. The Exhale Gloves cost around $20 or so.
Link to Gorgonz (flash site), Link to buy the gloves on Amazon (via Neatorama)