I saw this on Michael Nobbs' Twitter stream which sounds pretty cool.

Art House Co-op is organizing The Sketchbook Project 4 (already!?). Participants will get a Moleskine sketchbook (with the entry fee paid), fill it with art and mail it back. Then a gallery will be held at Art House Gallery in December 2009.

Visit www.arthousecoop.com/projects/sketchbookproject for more information.