hmm...wanna start another rumour, this is originally from a slightly drunken photog-guy in Bangkok. At a seedy nightclub (in Patpong no less), he chanced upon somebody who claim to be working for Nikon in Japan but was visiting Thailand facility at the time.
He was informed by the "NeeCON" guy that a camera with LBCAST 35mm x 35mm (note the square sensor) is already in the work. The camera is almost the same size as the F6 only slightly taller and dosn't need a vertical grip. if one want to take a potrait shot, he just push a button and appropriate masking will appear on the viewfinder to mask out the viewfinder/sensor to create a vertical/potrait image on 24mm x 35mm with 16Mpix
Total pixel on the 35mm sq. sensor is about 24MPix. Auto crop with viewfinder masking will be supported with DX lenses.