DIYparts.org is what Christian Einfeldt calls "a bazaar where people can develop connoisseurship around putting open source software on old but useful boxes, thereby keeping them out of landfill". Christian is the filmmaker behind the Digital Tipping Point documentary, and co-created DIYparts.org with Adam Doxtater of Mad Penguin.
Think of DIYparts.org as a swap-fest for used gear of all kinds -- from cases and motherboards to drives, monitors, racks, controllers, video cards, interface cards, PDAs and much more.
Links: http://diyparts.org, http://www.digitaltippingpoint.com, http://madpenguin.org.