I’ve been doing some reading, yes it was/is a Jet Tran airplane, but all development seems to have stopped in 2006. The winglets are different to the photoshopped pictures.

Pictures here :

http://www.airliners.net/photo/Jetran-Air/McDonnell-Douglas-MD-82/1088763/L/

http://www.airliners.net/photo/Jetran-Air/McDonnell-Douglas-MD-82/1075139/L/