American Express plans to blow into the windy city with a credit card for hip young adults. The new “IN:CHICAGO Card,” to be launched this fall, will offer a special rewards program just for Chicagoans. The card will carry no annual fee and a 0% introductory APR. The “IN:CHICAGO Card” is the second city-centric credit card from American Express. One-year ago AmEx introduced the “IN:NYC Card” for New Yorkers. Consumers can sign up to receive more information about the “IN:CHICAGO Card” when it’s available by visiting “www.inchicago.com”:www.inchicago.com and providing their e-mail address.