This is great news. Particularly impressed that they'll be able to save all my notes on the book, so the next time I check it out I'll still be able to see them. (Or if I buy it later, the notes will migrate to the book I bought.)
Guess this means I don't have to spend so much time trolling the 'net for free books anymore, right?
I'm just kidding, I'll never stop trolling for free books.