Myself, Ryan North (of Dinosaur Comics), and our friend Matt are publishing a fiction anthology later this year. The theme is essentially, "What if everyone knew how they were going to die?"Link (Thanks, Dave!)
Two things notable about this book --
1. Submissions are open to everyone, everywhere, and authors will be paid if their work is chosen.
2. Cory's convinced me. In addition to the printed book, the manuscript will be released online under Creative Commons. (An eventual audiobook will be CC too.)
We're relying on the fact that our theme is pretty particular, and authors probably won't be able to go on to sell their Machine of Death story to the New Yorker, to convince everyone that it's in their best interest to spread the material around (free, natch) as much as possible.