Picotux Linux-Based RJ45-Sized Computer : Gizmodo
Ah, small computers. Places to stick that annoying ping server that will drive your network admin crazy trying to track down... and with April Fool's Day just around the corner. The Picotux is a Linux OS with 8MB of flash on it, a serial port, and up to 55MHz of processor on it. Oh, and it's the size of an Ethernet jack. Just right for hiding inside of a miniature robot, or sticking into a wall and abusing your network. About the worst thing is the 3.3v DC power, but hey, if you can hide that, this will drive everyone bats.