The folks over at Typophile have a project going that taps into the collective visualization ideas of it's visitors. They are building letters of the alphabet pixel by pixel, based on the whims of the visitor. Each visitor is asked to designate the color (black or white - letter or background) of a pixel that makes up the letter. Very interesting. The viewer can also view an animation of all the choices made for that letter to day - watch as the letter comes together and morphs from a serif font to a sans serif font and back again. Pretty cool to playaround with.