I didn't see any previous thread on this, so I thought I'd point this out the board:
Free Books on the Internet: HarperCollins, Oprah, and Yale Join the Fray
The article links to a couple books I had never heard of put up for free:
The Future of Reputation: Gossip, Rumor, and Privacy on the Internet and
The Wealth of Networks. The former looks particularly interesting. I'll probably download that one. Both these works, I believe, now use
Creative Commons Attribution-Noncommercial 3.0 United States License, which would mean copies can be made for this site.
I think the blog was particularly interested in talking about free e-books since Freakonomics was published by HarperCollins. The company should think about offering that book for free.