This site is a great complement to mine. This photographer takes armpit photos of men who go to sporting events, which I believe is a great idea.
Here you can see the photography that I do which is not related to PitStalker. I work with male models, female models, architecture, landscapes, food, and cars.
I have seen several blogs entries which talk about how armpits can be erotic. This is the best one I have seen so far.