Although increasingly appreciated in fine art and stamp collecting circles, artist postage stamps, or artistamps, are more likely to be traded between the people who create them than they are to be exhibited in commercial art galleries or read about in philatelic journals. Artistamps are part and parcel of the grassroots network known as Mail Art, an alternative art of creative long-distance communication that intuited the demand for cross-cultural exchange long before the Internet. Although seemingly rigid, the postage stamp format allows flexible approaches in painting, watercolor, offset,...