Below is the text from their craigslist ad and here is the link to their website if you are interested in participating. I've already signed up.
important dates07/15/08 :sign up by
09/15/08 :postmark deadline
10/05/08 :show date
Call For Artists: The Canvas Project(http://www.arthousecoop.com/canvasproject)
Reply to: firstname.lastname@example.org
Date: 2008-06-21, 1:53PM EDT
We’re sending five 3x3 inch canvases to up to 500 participants from around the country. Artists cover the canvases using any medium they want based on the theme of “Memories and moments.” Anyone can participate–from the seasoned artist to the person who has never even drawn a stick figure. Show will be held at Art House Gallery in Atlanta, Ga.