If you have the standard apple cover and buy a piece of plastic slightly wider than the cover (width of a ruler) you will find you can hang it perfectly well between the window frame and the map holder on the 737. I am probably not explaining this very well, but trust me it works a treat for vitually nil cost, so worth figuring out.
I would assume that a major North American airline is looking for something less "homemade" and more official solution for their iPads.
