So I was at another site that I frequent off and on when I came across a link in a users profile that lead me to a really really great website. It's called Bookcrossing and here's a brief description of what its about:

bookcrossingn. the practice of leaving a book in a public place to be picked up and read by others, who then do likewise.

The "3 Rs" of BookCrossing...Read a good book (you already know how to do that) Register it here http://www.bookcrossing.com/home (along with your journal comments), get a unique BCID (BookCrossing ID number), and label the book Release it for someone else to read (give it to a friend, leave it on a park bench, donate it to charity, "forget" it in a coffee shop, etc.), and get notified by email each time someone comes here and records journal entries for that book. And if you make Release Notes on the book, others can Go Hunting for it and try to find it! I think this sounds like a really great idea and if anything it should be fun to see where your books end up.