BookMooch: New Life for Old Books. This is a brand new web site that offers a valuable service: it lets you give away books you no longer need in exchange for books you really want. “Every time you give someone a book, you earn a point and can get any book you want from anyone else at BookMooch. Once you’ve read a book, you can keep it forever or put it back into BookMooch for someone else, as you wish.” There is no cost to join or use the service, only the expense of mailing your books to others.
http://bookmooch.com/
