The same thing happened to me, I'd even drafted a letter to AAdvantage and Kelloggs. Then, lo and behold, the 300 points posted 2 days later, but with a posting date listed as 5 DAYS EARLIER!!! It seems AAdvantage wants to make a note of the 300 point coupon on its (our) account by distinguishing it from the points collected from actual cereal boxes. I would be patient, as another poster on another board also saw a time lag between the posting for the 200 points (which happened to them first as well) and the 300 points from the coupon.
[This message has been edited by travelfan (edited 01-18-2003).]