There's a major photographic resource building up on the Internet called the Luminous-Lint - World Photography project.
So far, the site has collected the works of nearly 2,000 of the greatest Photographers from around the world, hundreds of quotations and annotates more than 5,000 Books on photography.
According to the site's founder, Alan Griffiths, "This is one of the most comprehensive and highly integrated sources for the history of photography on the Internet."