There is an interesting note at
Teleread blog regarding Amazon's ebook listings. According to the blog and Adobe's Bill McCoy, "the selection of commercially relevant e-books at the Kindle Store is still very thin. Less coverage of what really sells in trade than a decent airport bookstore. Much of the 'vast' Kindle Store selection is filler eDocs. Some major publisher lists are MIA. . . . [T]he race to get everything that sells in digital isn’t over, it isn’t even half over. When you get beyond U.S. market, it has barely begun, and Kindle is not the leader."
I wonder how much of the Kindle Store ebook selection is simply filler as compared to the Sony Connect store.