Local Motors has produced the first drivable 3D printed car in 44 hours. Actually only the body was printed and assembly is not included in the 44 hours, but still impressive.

Local Motors Takes Their Single-Print 3D Printed Car for a Test Drive - SolidSmack

It's cool, a friend of mine is also into 3D printing, they make the wire for 3d printers..

But those plastic cars will never replace the metal classics for me..