Mail Me Art 2 is a project that is described by it's title. You send out art created on an envelope and it will be included in an exhibition and possibly another book. The first Mail Me Art was a great success and looks like they are going for round two. I wish I had thought of this idea as think of all the amazing art they must get every month!
Below is a bit from the organizers: Every month while the project runs, starting at the end of May, we will be choosing a piece of mail art to receive a copy of the Mail Me Art book plus an art-related prize. If there are enough submissions we plan to hold another exhibition and if we're lucky (and the publisher still likes us!) there may be another book. As before, artists will receive 70% from the sale of their mail art, less any gallery commission incurred.