According to Chris Elliott (elliott.org) the current man in the barrel still is:
Primary Contact
Sean Bentel
Vice President Customer and Relations
4333 Amon Carter Blvd
Fort Worth, TX 76155
(817) 967-2116
sean.bentel <at> aa.com
The conventional wisdom is not to bother with phone or e-mail, but to send a actual courier or US Post Office mail.
Include necessary details, be dispassionate and succinct; leave out drama, feelings and lengthy descriptions.
That should make it easier for those designated to handle this kind of correspondence to reach some conclusion.