Burnelli aircraft design, cheaper, safer, more fuel efficient... why aren't these being built, what does Boeing and the other major commercial airline builders have against it?

Burnelli News Story from http://justacargal.blogspot.com/search/label/Burnelli where Tere has more than one post that displays photos, engineering drawings, and lots to read to show that the basic flying wing design that has evolved or drawn inspiration from the 1921 Burnelli lifting body design is a damn good idea. Creat more lift with the body, have smaller wings, and you'll have less drag as well I imagine

The Old Motor http://theoldmotor.com/?p=5935 had posted this 1935 press photo back in Feb 2011, which is in great focus and close up of the fuselage. The 1934 Ford was underslung to demonstrate it's high altitude starting ability (would have been easier to have a press conference in high altitude Colorado mountains)

I think I've posted this image before, but it's lost in the archives if I did.