Compubeaver
Kasey McMahon decided to combine an interest in taxidermy with her PC. Fearing that the natural world is being replaced by technology, the artist installed a working computer inside of an idle beaver. First, she crafted a computer from the motherboard up, tested it, then hollowed out a stuffed beaver and molded the two together using spandex spray, resin, and fiberglass. After three months of work, the result was Compubeaver, followed up by its accessory, Text-o-Possum, a stuffed possum that's equipped with a laser in its back leg that projects a virtual keyboard. McMahon was generous enough to provide a 29-step guide for the rest of us, in the hope that we'll each case mod a beaver and create our own animal-based data processor. Just imagine using a raccoon laptop at Starbucks. Perhaps that would inspire them to provide free WiFi.
Update: See also installing Linux on a dead badger. (thx, michael)