Joern Roeder and Jonathan Pirnay's project "fbFaces" wallpapered a room with profile pictures from Facebook that was created with a "Facebook crawler, built using JavaScript & PHP, that starts at the public profile of any fb-user, saving profile image, facebook-ID and name, and afterwards continuing its way to the public profiles of the user's friends. And so on..." The effect is vertigo inducing to me both conceptually and physically.