With regard to CX747's post above, the biggest seat cost advantage Airbus is willing to own up to now for the A3XX v. 744 is 13%. For the past 3 years, the Airbus claim was 20%!!! If the seat cost advantage is 8%-13%, it would not take much to equal those figures or come very close. The blended winglets could add 3%-5% advantage (based upon early estimates as well as improvements to other models of aircraft). Add the trailing edge wedge, and some engine improvements (the engines are evolving constantly) and boom!!!, you have a great bird!!! Last, figure you don't have $12 Billion to $13 Billion in development costs, and it appears you will have a hell of a bargain in the 744ER. I think it is important for all of us to see Airbus is careful to use current the 744 with no modifications in comparisons with it's A3XX. All of the 744ER mods are simple and inexpensive (winglets, trailing edge wedge, any supplemental tanks, and updated PW4000's, CF6-80C's or Trents).