Photo Notes - The PhotoNotes.org Dictionary of Film and Digital Photography is the Internet's most complete online glossary of still photography. Over 1400 terms and 90,000 words of definitions; all available in an easily searched, cross-referenced Web site.

Stephen Gandy's CameraQuest - Site devoted to buy/sell/trade/repair, mostly for classic cameras. There's an extensive list of on-site classic camera profiles with tons of information on the topic.