There's a web site called Book View Cafe, and it's a co-op of professional science fiction and fantasy authors. (Full disclosure here: I'm a member.) The site exists so its members can publicize their work and make it available to readers on-line.
BVC has a lot of fiction available for download, both free and for purchase, and without DRMs. The books and stories are in HTML, PDF, and MobiPocket.
Some of the site's authors include Ursula K. LeGuin, Sarah Zettel, Vonda McIntyre, Judith Tarr, and Brenda Clough. And me.
Anyway, the URL is
http://www.bookviewcafe.com/ . I have a handful of free stories up, and I'm working on putting up more:
http://www.bookviewcafe.com/index.ph...iks-Bookshelf/
And at the moment, BVC is holding a contest. The site is nearing 1,000 members (reader membership is free), and once we hit the magic number, we're holding a drawing. The winner, chosen from the original 1,000, wins a bunch of free stuff. So hit the site and join now!