Everybody – and I mean everybody – should read The Naked Face.

There seems to be much more about this on the web…

Update: Neal Stephenson’s Jipi and the Paranoid Chip also features analysis of facial expressions (and many other things). Neal’s one of my favorite writers; here are some more links to excerpts of his works. Several other great writers are featured on that page, which BTW is by Eva van Emden.