Yup, I know, many of my sciblings have already posted about this, but curiously, I saw this first outside the Seed's blogging stable, on Majikthise, several hours before anyone here picked up on it.
Yes, the entire works of Charles Darwin will be placed online for you to browse, search and read for free on this website. Not everything is up yet, but they are working on making it as complete as possible as soon as possible.