Dirk Funk
Evil Penguin
Yup, I've taken to seeking out the 2D versions of movies, though this is much more to do with how they look than the cost. But the extra cost is a real pisstake if there's no 2D option. A few weeks back I saw a 3D movie that cost £17. For one ticket. Granted it was at a central London cinema aimed at tourists, but still unbelievable.
Here the prices go from $8 for a matinee in 2D all the way up to $17.50 for IMAX 3D.