Honeywell did a test flight of this very odd looking Boeing 757.
The small engine attached to the front part of the fuselage is being developed for regional jets and private commercial jets.
See all the pictures here from Cupps at Flightglobal Airspace.
Thanks to Jon at FlightBlogger for the tip. Incidentally, Jon has done a very interesting analysis which compares the impact of fuel prices on the operating costs of the Boeing 777 and the Airbus A330. It is definitely worth a read.