During the keynote, Steve was showing the nice presentation of books on wooden shelves on the iPad, as attractive way to show the forthcoming huge market of eBook. The GUI was easy to use and intuitive. Too intuitive?
Having a book on a wooden shelf is nothing new, and happen in many places or homes, however on a virtual location, it clearly reminds a known interface: Delicious Library.
Of course, nothing is more similar than books on 2 different wooden shelves, however, it seems difficult to think that the team that designed such pre