Although only a design which clearly has not mechanical backing, a BlenderNation contest looking for designs in a category related to 'The Industrial Revolution' churned out quite an interesting piece. The designer merged the 1st Industrial Revolution with what may be the beginning stages of the 3rd Industrial Revolution, with this steam engine powered 3D printer. What do you think? More details on this design can be found here: http://3dprint.com/18682/steam-powered-3d-printer/