This is a really good write up. For people looking for practical experience with these types of methods, I'd also recommend checking out theano and/or pylearn2 (which is built w/ theano).

theano: http://deeplearning.net/tutorial/

pylearn2: http://deeplearning.net/software/pylearn2/

NIPS, a big ML conference, is in December, so expect to see a large amount of new ideas and applications re: deep learning to come out of that.