On Today programme (Radio 4) this morning, piece about http://www.darwin-online.org.uk/, Charles Darwin's papers. Coincidentally, was on http://www.darwinproject.ac.uk/, yesterday, which is his letters. I think it might be all of them, although they are being published in a series of books as well (vol. 16 due later this year).
Bit in Guardian too - http://www.guardian.co.uk/science/2008/apr/17/darwinbicentenary.evolution
2009 is 200th anniversary of birth of Darwin, and there do seem to be a lot of books about him appearing.