Jail Finds is a flickr set of art found stuffed inside books by the account holder at the jail where they are a volunteer running the book cart.
posted on Oct 29, 2007 - View this thread

I found some of your life. You are unknown to me. Your camera's memory card was in a taxi; I have it now. I am going to post one of your pictures each day. I will also narrate as if I were you. Maybe you will come here and reclaim this piece of your life. (via the Morning News)
posted on Sep 17, 2004 - View this thread

The Box Doodle Project - Cool cardboard art.
posted on Jul 19, 2004 - View this thread

The Museum of Bad Art
posted on Mar 15, 2004 - View this thread

Stickernation - found sticker art from around the world.
posted on Jan 27, 2004 - View this thread

TRASHLOG — or — arresting and acute observation of ordinary offal.
posted on Jan 23, 2004 - View this thread

Found Typography
... and if you liked that, please also try Hundreds of Thousands, both from Itchy Robot
posted on Jan 22, 2004 - View this thread

Time Tales : a collection of abandoned photographs, found at fleamarkets, thriftshops, or just lying on the street
posted on Nov 15, 2003 - View this thread

Object Not Found. Lost and found photographs, postcards and letters.'The collection of postcards, photographs and letters collected here allows me to peek into a however small part of other peoples lives. '
Found via Countries of the Mind, a page about an imaginary world, and its postage stamps and postcards.
Related interest :- P22 Mail Art, and gallery.
posted on May 22, 2003 - View this thread

StreetMattress.com - Much like "found art", this site chronicles the phenomenon of abandoned mattresses, and finally gives the public a forum on which to comment on them. Some if my favorites are here, here, and here.
posted on Jun 11, 2002 - View this thread