Ouch I share your pain... I left a Canon Digital SLR, a fine lens and a 1 GB flash drive in over this past Labor day weekend in F on an MD 80 from MCO-STL... By the time we realized and got back to the aircraft, it was pushed back and the cleaning crew said they found nothing
Nice GAs radioed aircraft for us and said that if crew found it they would notify the AA ExPlat desk for us... almost 8 weeks later, still no camera... I've given up.
Basically, note to self - "check and double check even when rushing for a connecting flight."