Join Date: Jan 2008
Location: NYC, NJ, Long Island
Programs: DL DM, 1.6MM, UA Silver, NEXUS, SkyClub & AdmiralsClub Lifetime, Bonvoy Titanium
Posts: 6,649
The CO website indicates that 1A is an Exit row. FWIW, I just started to book a flight that is wide open in order to look at the seat map (CO2361 on 9/3/2010) and 1A is an available, Non Exit Row, non-Premium seat on an ExpressJet flight.
My guess is that the seat map on co.com is wrong.