Bookcrossing

I haven't read all the info on the site (too tired + these guys love to read so there is TONS on that site) but here is the gist of it. This is an organized movement to release books in the wild. You register on the site, get an ID for the book you want to release, and boom! leave it for others to enjoy. With any luck, the person who picked it up will go to the site and register it so you caan keep track of its progress.
The idea is to get books to circulate in a free un-hampered way as God intended... : )
Go on the site and read for yourself. It sounds like a lot of fun!
http://www.bookcrossing.com/