Check out Papergirl San Francisco, a mail-art and delivery systems art project. Artwork from all over the world is delivered like a newspaper by bicycle.
Over at Metafilter, they had this to say about the project:
“Papergirl was founded in Berlin by Aisha Ronniger and has been carried out once a year in the summer since 2006. It began as a response to a tightening of German graffiti laws. Papergirl SF is the San Francisco division of the original Berlin Papergirl Project. Papergirl SF seeks to bring art to people in a new, exciting and participatory way; directly and freely by bicycle.”
You can submit your art work till Saturday, October 8, 2011. All the artwork will be distributed Saturday, October 29th, 2011.