This is a great article I found on BoingBoing regarding the ebook market. I strongly feel that eventually, this will be one of many routes of distribution. From the BoingBoing post:
"My pal and collaborator Charlie Stross has a fantastic essay up today, "Why the commercial ebook market is broken." He covers a lot of ground -- DRM stinks, publishers have mucked things up, writers have said dumb things -- but where he really sings is in puncturing the balloon that is the fear that an ebook reader will make ebooks into substitutes for print books."
Check out the article here.