Derrida plays himself in 1983 film about concepts of memory; he says he is here a ghost in the art of ghosts, cinema. Many clips from this film found here
a very large sociology site from the University of Amsterdam; of particular interest are a section on web sociology and one on famous sociology; site is full of both explanations and links to other full text articles
for those interested in infoaesthetics, this set of 57 images about aspects of knowledge is a stimulating philosophical exercise and a way to ask students how they might have made an image of similar interacting concepts