AA announced today that it will build a new "Business Lounge" at STN that will open sometime next year:
At Stansted, American is set to begin the construction of the American Airlines Business Lounge in Satellite Two. Scheduled for completion in Spring 2008 with seating capacity for 48 people, the lounge will feature amenities including a self-service bar, cyber cafe, wireless and wired Internet access, restrooms, and two shower rooms. Passengers will be able to board their flights directly from the Business Lounge.
http://biz.yahoo.com/prnews/071026/laf079.html?.v=8
For now, no lounge. Sometime in 2008, a new Business Lounge. ^