Hmm sounds interesting.. of course, the strings the autographs are stored in would be client strings right? It sounds fun if there was a reason to get autographs.. Like what is the point in saying "I GOT <name>'S AUTOGRAPH!!" when no one else can see your book.
I made a book graphic not long ago (it's a book with pages that turn like a graphic interface not a little book image) I had some ideas on what to use it for but never got around to making them.