Adam Hodgkin notes a discrepancy between Amazon’s cloud-computing efforts and the Kindle. From Exact Editions:
If Amazon decides to switch tack on the Kindle and treat it simply as a blank slate on which users can rent rather than outright buy titles, they will have the infrastructure in place to make this change. Amazon is a true believer in the ‘cloud’ for next generation computing, but it apparently thinks that digital books are different: droplets on the ground rather than nodes in the cloud network.