Udi Manber (former "Chief Algorithms Officer" at Amazon.com, now CEO of A9) motivated Amazon's Search Inside the Book feature by saying:
- "Why not have users take pictures of their bookshelf? We could scan the images, extract the titles, and then let them search the entire text of the books they own."
Interesting how Amazon's extensive web services API is spurring innovation outside of Amazon.
Update: John Siracusa has a detailed review of Delicious Library.