Didn't Boeing abandon it during the Mid 90's?
Blended Wing Body concept
A completely different path that Boeing may choose to pursue in the near future is the Blended-Wing-Body, or BWB. Despite your rather unappreciative comments, some of our staff have had the opportunity to meet with and talk to one of the concept's creators, and we've found it to be a most interesting design. The BWB is related to the flying wing, but is a somewhat more sophisticated concept that resulted from a study to determine the optimum low-drag shape to contain a given volume of passenger space. The resulting fuselage resembles a flattened sphere that tapers down and blends into the outboard wings, hence the name Blended-Wing-Body. The thick center-section could hold some 500 to 800 passengers, as illustrated below. Additional studies have focused on smaller variants in the 250- to 300-passenger range, and a recently reported study indicated that a cruise speed of Mach 0.9 over a range of 7,500 to 8,900 nm (13,875 to 16,465 km) might be an optimum design point.
The BWB was first created by the commercial aircraft division of McDonnell Douglas (MDD), a firm that was purchased by Boeing in the mid-1990s. Though Boeing expressed little interest in continuing most of MDD's projects, they have shown the foresight to carry on low-level development of the revolutionary BWB. However, Boeing has not yet provided any indication that the design will go into full-scale development or production. While such an aircraft could potentially reduce operating costs significantly, concerns have been raised about compatibility with existing airport infrastructure and the difficulty of evacuating so many people from the deep interior cabin in an emergency. In addition, many airlines are worried that passengers may be unwilling to fly an aircraft that is so different looking from what they are used to.
That pretty much sums up what we know of the possible future directions Boeing may take, but Airbus is even more of a mystery. The multinational conglomerate has focused so much of its efforts on developing the latest variants of the A330 and A340 as well as the completely new A380 that little is known of what its next big project might be.