It's worth noting (?) that today's AA/BA/IB joint business plan details show AA charging BA fuel surcharges on redemption tickets acquired with AA miles. This is a major change, and I suspect that shortly the "exemption" for BA fuel fines obtained by buying RTW products through AA's RTW ops will be a thing of the past.

(There are many positive things for AA flyers in the new scheme - 100% earning on BA TATL regardless of economy fare bucket, reinstatement of Plat/EXP bonuses, etc., but the fuel surcharges and punitive mileage expense for cross-metal mileage upgrades - from full fare categories only - are some negatives.)

http://www.flyertalk.com/forum/ameri...les-ba-ib.html for starters.