If you have an interest in science and religion or history you will probably be interested to know that Cambridge University has digitized and published on the internet its collection Darwin material (30,000 odd items and 90,000 images, as well as audio material). From the web site:
This site contains Darwin’s complete publications, thousands of handwritten manuscripts and the largest Darwin bibliography and manuscript catalogue ever published; also hundreds of supplementary works: biographies, obituaries, reviews, reference works and more.
Almost all is online only here: such as 1st editions of Voyage of the Beagle, Zoology, Descent of Man, all editions of Origin of Species (1st, 2d, 3d, 4th, 5th & 6th); important manuscripts: Beagle Diary & field notebooks, Journal, transmutation notebooks and Autobiography.
You can access the site at: The Complete Work of Charles Darwin Online (darwin-online.org.uk).
More too, over at Complete Darwin Papers Debut on Internet | Wired Science from Wired.com