I came across a new concept for me when I learned of BookCrossing. It's a little like geocaching without the GPS. It's a sort of international, book-tracking site. When someone finishes a good book, they label it and let it go free. Each book has an identification number and a description of where it was left. When found, a new guardian signs in and indicates the book is out of action. Then, after being read it can be put out in the wild again. Libraries have always offered free reading but here there's the thrill of the hunt too. I read about it on a blog called, Own Office Joey.
This just shows the various ideas that can be initiated. Who told you the Internet was just about accessing porn?