The Concorde was far too expensive to maintain for the amount of people that used it. I recently got to see one at the Smithsonians Udvar-Hazy Center at Dulles Airport, and the actual cabin area was a lot smaller than I imagined; I'm sure it was incredibly cramped in there. Too bad, though; it would be nice to have widespread supersonic commercial flight. Take the SR-71 Blackbird, for instance; the one in the museum took
two hours to fly across the entire continental US.

As for the A380, very cool stuff. There was a recent feature in Popular Science about the unveiling. That is one massive jet. It will be interesting to see which concept proves to be more popular, the super-jet or Boeing's new, smaller 787 design.