Ok, this will probably appeal more to the tech-types here, but I thought this was a really cool idea. Based on "hobo-sign language", warchalking is a means of marking Wi-Fi 'hotspots' where one can connect gratis to a wireless network. Or course, its catching on in Europe, first... Note to admins: Beware of these symbols in the vicinity of your corporate LAN Warchalking Visual Cues To Urban WLANs (@Slashdot) Warchalking.org
