Anyway, AA's fleet of 727's, 737's, S80's, and F100's have all gotten the "More Room Throughout Coach" treatment.
Believe me, having 34" or slightly more of legroom on these planes makes a HUGE difference, especially on flights of two hours or more. I believe the new 737-800's AA are now flying are configured with about 135-140 seats in the MRTC configuration.
AA is in the process of applying MRTC to their International planes, and should be complete by late this year.
The fact that passengers no longer gripe at AA about "cattle car class" in Coach is already worth it to AA employees.