I think the most interesting thing to see @ AA is the Operations Center, especially if we were to be blessed with truly horrible weather someplace in the country.... <evin grin>. I'm sure we'd all like to meet the person manning the "cancelator" desk.
However, I think tours of the OC are more difficult to come by & we'll need to see what the Tour Desk can come up with for us.
Interesting article which mentions the AA OC
As for seeing the AAdvantage CS, I found it vaguely reminiscent of the cube farm at our own HQ, so not really all that exciting.
Also interesting is the AA Flight Academy, especially if we can stick our noses into one of the full-motion simulators.
A sample Academy tour