Melena Ryzik, 3-D Art for All: Ready to Print. New York Times, May 14, 2011.
http://www.nytimes.com/2011/05/14/arts/design/makerbot-is-a-new-3-d-printer.html?_r=1&scp=1&sq=3-d&st=cse
Note:
(a) In early March this year, European Aeronautic Defence and Space Company (EADS) unveiled Airbike, through 3-D printing with nylon.
(b) Now New York City-based Makerbot Industries
http://www.makerbot.com/
is commercializing it for ordinary joes.