At this point you're unlikely to be digested by ravenous wild RepRaps, because they only eat several types of plastic, including one made from milk proteins. As a small crowd looked on, Vik Olliver from RepRap.org adjusted the size of a 3d model of a ring to fit a friend's finger, pressed "Print" and the machine went to work making it, layer by layer, from a type of plastic developed for dental molds.
The next step toward world domination? Fabricating the circuit boards by layering insulative plastic and a conductor. I, for one, look forward to my new job assembling the children of our new RepRap overlords.