Every once in a while, someone comes out with a new product that makes you go, “Oh! Of course!” Today’s offering comes to us courtesy of HairFree, a hairbrush that self-cleans and removes excess hair. While it’s not the most earth-shaking new idea, the value lies in its simplicity. Pull a knob on the handle, and the base of the bristles rises up to push the collected hair off. As they say in the Guinness ads, “Brilliant!” Details are at the Web site, but it’s got audio, so be forewarned.