I just heard on the radio today and then Googled it. At Conel University they scanned the head of a young boy and then printed a ear and injected some cartilage and it grew.
Amazing.... I wonder if they can make other body parts?
Yeah, and when they figure-out how to make precision metal parts with this technique, we're all screwed!
Imagine going to Office Depot, purusing the printer ink and finding cartridges of FE, C, S, Ti, Mn, Si, Pb, AL...
EDIT: Computer! Early Gray, Hot.