Thanks for the explanation, ConcordeBoy. Oddly enough, I was under the impression that, for Airbus anyway, it was the other way around: announcing orders as soon as an agreement had been reached to tentatively sign a letter of intent. As far as Boeing not announcing these, I got the impression from early posts that the orders were signed, sealed and finalized but, for some reason, weren't yet publicly announced.
New airplanes, new employees, low fares, all touchy-feely ... all of them are losers. -Gordon Bethune