Congrats in advance on 3MM; just went over 2mm a few weeks back. Yep, as Blumie said, you get a nice e-mail from Kurt Stache:
Dear fredmartens,
Congratulations on reaching the next Million Miler level!
As the millions of miles add up, there are fewer members who earn this special designation. In just a few weeks you'll receive a new elite membership card that acknowledges your multi-Million Miler status - plus some other gifts we think you'll enjoy.
We are gratified by your dedication and confidence in us. Thanks for your commitment to American Airlines and the AAdvantage program.
Yours truly,
Kurt Stache
President
AAdvantage Marketing Programs