The December issue of Flying (page 75) describes a low-tech Russian solution to the checked and carry-on baggage problem. On the Ilyushin-86, which could carry up to 350 pax, the pax entered through airstair doors on the lower level of the plane, put their baggage on the shelves on that level, then walked up interior stairs to get to their seats. On their way out they reclaimed their baggage from the shelves. SO everything was carry-on, but if you wanted it in the cabin then you had to lug it across the ramp and up two flights of stairs.