Raku Gaki

A part of the Flo:Q Japanese social networking site, the "Minna no Raku Gaki" site/flash widget takes the pict-o-chat-ish sketches of all the site's users and turns them into graffiti-esque tags super-imposed on a concrete wall.
Not exactly usefull, but pretty to look at. Millions of bored Japanese people have turned tiny picture drawing into an art form. They take that shit seriously, folks.