The creative makers at Metrix Create: Space have had their first successfully print on the Big Robot, which is a CNC router table converted into a large extrusion based 3D printer. The basic technology is much like a RepRap, but the nozzle is about 6mm, while most RepRap nozzles are around 0.5mm. It currently prints using HDPE from old milk jugs that have been run through an industrial shredder to make chips. These are then feed into a drill auger driven extruder.
Their first goal is to print a boat, presumably for a milk carton boat derby. After that they are asking for input on other things that would be good to print on a large 3D printer. We think printing full sized people could be very interesting.