Actually, yes. Though it does require a modification to the extruder assembly, and the model does need to be fired afterwards. This one is about the same size as my 3d printer chassis http://www.youtube.com/watch?v=trdz4YDbdsw
This one is probably the way to go if you wanted to make large scale clay items. It's considerably bigger than my printer, but also much slower.
http://www.youtube.com/watch?v=F2TOrakJDpU the clay pump and delivery system though is much better than the syrenge plunger based models.
You can print out the smaller variant using these files: http://www.thingiverse.com/thing:20733 It will also print chocolate or wax. Wax being useful for lost wax casting amongst other things. Although you can also do that with PLA plastic.