http://www.bookcrossing.com/

I like this idea, a lot. DOn't know why, really, cos logically - so what? But I like it anyway.

Sounds like a great idea to me too. Only thing is that I love my books, well most of them - they can have the Dick Frances!

Reminds me of a scheme in London (i think) where books were just left in public places, to be picked up, read, and passed on. I sounded like such a good idea i was sitting on a bench one day considering leaving my book behind. Then it started to rain...