The Typo Eradication Advancement League.
From the Boston Globe:
They seek, in short, to do for America's public signage what spell-check software has done for interoffice e-mail: smarten it up and make it easier on the eye. Their weapons: Wite-Out, markers, ink pens, tape, and nerves of steel.
"I figured, Steinbeck had his dog and Kerouac had his drugs. I'd have my typos," said the 28-year-old Deck of what he calls his Typo Hunt Across America tour.
(Globe link via Roger)