It is interesting in the design and
efficiency of operation. I am surprised that it has not made the
commercial market place with our increasing fuel costs.


At first glance this looks like it's based on similar principles to the
Blended Wing Body (BWB) which is currently being investigated by NASA
and numerous major aircraft manufacturers (although it is less "blended"
than a BWB).

http://www.nasa.gov/topics/aeronauti.../bwb_main.html