3D Printed Chocolate Sculptures

Pretty incredible the details you can put into chocolate via additive manufacturing (3D Printing). Check out some of these pieces done by a 3D Printer. These were done with Reprap style 3D Printers:

http://www.3ders.org//images/chocola...-gallery-5.jpg
http://www.3ders.org//images/chocola...-gallery-8.jpg

The early MakerBot Cupcake printers had a frosting option pneumatic extruder. We had one at Maker Faire NY in 2010 spreading Nutella on bread and the kids loved it. I wonder if that is how they are extruding the chocolate?