http://www.aa.com/i18n/urls/entertai...tle=wifi#wi-fi

"Enjoy 30 Minutes of Complimentary Wi-Fi On Internet-Enabled Flights
Enjoy a complimentary 30 minute Inflight Wi-Fi session from CitiŽ / AAdvantageŽ on Internet-enabled flights through February 16. Just enable Wi-Fi on your laptop or handheld device, launch your browser, and follow the instructions to get started."

Not sure if you need the AAdvantage card.