TORN posted some great pictures of the work being done on Hobbiton. I asked GDT for some details and this is what he said:
Mata Mata is the place where HOBBITON is being constructed. I’ve been there and laid out a few new Hobbit holes but 99% we are just REPRODUCING what was there for the Trilogy. Its monitored every week from my office and then, as the work progresses Ill start travelling there.