Watched a 3D movie/documentary the other day which was quite good. It's call "the Cave of Forgotten Dreams". Its about a new cave in France where they have found 30,000 year old cave paintings and the 3D effect was nicely done. The got permission to go deep into the cave to film.
If you like anthropology (and I do) this one in quite interesting.
Also got 'John Carter 3D' and will report on that one.