My office was getting a bit messy so I re-purposed an old PC case and mounted my ARM boards, a switch, and far too many power supplies into it: http://people.linaro.org/~michaelh/racked/IMG_20110131_145444.jpg
The Stagecoach board goes where the motherboard used to: http://people.linaro.org/~michaelh/racked/IMG_20110131_145403.jpg
It turns out that a PandaBoard fits well in a floppy drive adapter slotted into a 5 1/4" drive bay. 2x PandaBoards, 2x BeagleBoards, and a Stagecoach gives 12 cores for a total of 9.76 GHz of processing... not as cool as David's box, but I like it :)
-- Michael