I read somewhere (I think in Flug Revue´s current edition) that Boeing was looking into the possibility of fitting the 739 with additional emergency exits, thus increasing capacity to over 200 pax as opposed to the standard 739´s 189.
Do you have any info on that "737-900X"? How seriously are they pursuing that, where would the exits be located, were they asked to do it by customers etc.?
Any insight appreciated,