Book Exchange Sites

Recently, I've been learning about sites where folks are sharing books, and it seems that librarians should be watching these sites carefully, and thinking of ways that we can engage in these cultures and refer readers to them, particularly considering that library budgets have been on the decline. Here are some links to websites where users can exchange books (and ideas):

Bookmooch "a community for exchanging used books" (free)

Paperback Exchange a low cost book rental website (about $2.50 per book)

the bookcart a low cost book exchange (about 50 cents per book)

There are many other free online trading services for various media types; we should watch these services and think about ways that libraries might use these services as models or refer folks to these services when it seems appropriate. . .