= Live Graffiti =
Still not really released, Peter Kuhn and I made an Android application where:
 * there are black and white drawing tools
 * drawings show up as the phone's wallpaper
 * drawings are automatically shared by people using the application, over the Internet

Results can be seen [//livegraffiti/?id=test here].  Note: There's no telling what anyone has last drawn.  Beware.