Lounges: Yes in LAX and LHR.
Priority Security Line: Yes
Extras?
Increased luggage allowance - 3 bags upto 70 pounds each.
Pre-order meals online 30 days prior to departure.
Enjoy the Bose QC15s Noise Canceling Headsets
Open Bar onboard
One of the best things I like in AA business / first is: Warm nuts and sometimes warm cookies