Here's a look at the 2009 Trail Days T-shirt, with the design idea borrowed from the ATC (Thanks, Laurie, et al.) and done locally:
http://www.traildays.us/tshirts.html
The Town Clerk models the shirt here. Go by the Town Hall during Trail Days and buy a shirt, $10. Backpacker Magazine donates the shirts, and all proceeds go to support Trail Days.
The back of the shirt (see photos) has a list of all trail-maintaining clubs, from Georgia to Maine.