Noted indie publisher Small Beer Press has launched a web-based ebook store, Weightless Books and are currently pursuing many other independent publishers to join them in the venture. The store offers ebooks in blissfully DRM-free PDF format.
Small Beer Press is one of my favorite publishers, focusing mostly on short story collections and anthologies, and run by Kelly Link, who I have called the greatest living short story writer, and her husband Gavin Grant. There's a lot of great books on sale already at Weightless, including Georges-Olivier Châteaureynaud's remarkable collection A Life on Paper which I mentioned once before and the latest issue of Lady Churchill's Rosebud Wristlet, the zine that Link edits and which is on my list of Fiction Magazines Worth Reading.