I just read a story on the aol finacial pages that Boeing has decided to halt development of the super-jumbo 747x in favor of a concordesque plane described as a mid-sized (250 pax), delta-winged aircraft that would fly just below the sound barrier cutting some 90 min. off Trans pacific flights.

Boeing has been unable to take any orders for the 747x as apposed to the Airbus super-jumbo which has over 60 orders.

Sorry for the paraphrase, I have no idea how to link to this story. Doc?