I thought this was really neat. (http://en.wikipedia.org/wiki/Paint-on-glass_animation) I'll post some works up when ever I find them.

Black Soul (http://www.nfb.ca/animation/objanim/en/films/film.php?sort=director&director=Chartrand%2C+Martine&id=50415)
Old man and the Sea (http://www.pascalblais.com/it_petrov_04.html)