It's a site that authors can post short stories on for download. Supposedly readers pay 99 cents to download and for each download the author gets 30 cents. They claim to be "The i-tunes for stories".
I'm pretty sure it will be a waste of every author's time and first world publishing rights to post stories their. I doubt you'd ever get enough downloads to get you more money than if you'd just sold the story, but who knows.