Libraries have gone into e-book lending in a big way recently, and now Amazon is getting into the act with its Amazon Lending Library. I've been watching e-books pretty closely, and this seems like an interesting development: get a Kindle and Amazon Prime, and borrow a book at a time for free -- sort of like Netflix for books.
There are limits on which books. The Wall Street Journal points out (subscription) that none of the six largest publishers are participating. I'd be interested to know what kind of consideration Amazon gives to publishers for allowing their e-books to be lent, and what impact it has on the rankings of those books in the Amazon store.