Just announced on the AAdvantage Facebook Page, you can follow this link and register for $100 off on a $250+ fare if you book it by 9/5/11 and travel between 9/6/11 and 2/16/12 (with some blackout dates). You have to book the fare on your Citi AAdvantage credit card.
Here is the fine print:
1In order to be eligible for this promotion, you must be the primary Citi / AAdvantage credit cardmember and have an open Citi / AAdvantage credit card on or before 8/10/2011. The AAdvantage number and email address you register must belong to the primary credit cardmember. See “Terms and Conditions” below for full details regarding this promotion.
2Excludes traval(sic) on 11/18/11 – 11/23/11, 11/26/11 – 11/28/11, 12/16/11 – 12/23/11, 12/26/11 – 12/31/11 and 1/1/12 – 1/4/12