Nice article today in the NY Times on 3-D Printing, one of the enablers of the Long Tail concept for manufacturing.

One interesting quote:  "'It costs $5,000 to $6,000 to print one of these legs, and it has features that aren’t even found in legs that cost $60,000 today,' Mr. Summit said."  A promise of both faster AND cheaper?  Basic project management rules would disagree, but who can tell.