Tor Books are working on a new site and if you sign up to be notified about it you get links to free e-books sent to your e-mail! The last book sent out was John Scalzi’s Old Man’s War. I have it sitting in my bookshelf since a while back and it’s actually pretty good. Acccording to Scalzi more books are coming, looking forward to it!
There’s also some really nice free reading available at the Baen free library. I recently re-discovered it and read John Ringo’s “A Hymn Before Battle” and “Gust Front”. Both were pretty decent but a bit to hard-core military for my taste.