I've sent work to an artist in Michigan and he's already started putting some work up out there: http://www.artbysammo.com/
There is an artist named Shelia Gray who's dropping work around New York this week: http://www.3cornersmedia.com/
Real Small Artist Allison Compton describes her project here:alcompton.blogspot.com/2008/03/real-small-art-b-cs-of-art...
Bart R. Schultz - The Masking Tape Guy - is branching out to Baltimore and Philly: http://www.maskingtapeguy.blogspot.com/
Other artists are working in Gainesville, Florida; Denver, Colorado and Washington D.C.I'm also participating in a group show called Artomatic, opening May 9, 2008 in Washington D.C. ... which includes 800 artists and over 50,000 visitors during the 28 exhibition.
More information here:
Success Stories: http://www.realsmallart.blogspot.com/
Artist Registration: http://www.realsmallart.com/
About Tiffany: http://www.iknowtiffany.com/