random idea: It would be cool, if you could combine a personal book database with an online book search engine.
aka, search for “sendmail smallblock fuzzface” in the full text of books, but only the books I own.
Be it something like Delicious Library, or even say, Amazons knowledge of what books I’ve bought, I still think this would be handy.
Even if the search only returned a paragraph or so of context, along with page numbers.
Bonus points if it could also search books friends own, or say, the nearest library.