I just got done reading the newest Communication Arts (photography annual) and found reviews for a couple of sites that looked interesting.

http://www.photogravure.com/
I've been interested in this since seeing a couple in the Kimpt exhibit last winter in NYC.

http://www.photographymuseum.com/
Some cool info if you can get past the really lame site design.

As a bonus...if you like to draw or watch people draw: http://www.sketchtheatre.com/

Alan.