eMachineShop.

One of my favorite magazines in the world (only preceded by Budget Travel), Wired, has an excellent article this month by Clive Thompson on eMachineShop, a "dream factory" of sorts that will create anything you design for a price. Really. For the story, Thompson sent in a design for a guitar made of acrylic and aluminum that in the end was actually too heavy for use, but it opens doors for a slew of practical mash-ups and creations. For example, Thompson cites a Norwegian sheepherder who employed eMachineShop to create GPS tags to keep track of his animals.