http://www.coroflot.com/nedmulka/D5R
This Nikon D5R camera is a designer’s concept created by Ned Mulka. The idea is to include the mirror, prism and sensor into a rotating element that can reduce the camera size and weight.
Senior thesis design project at the University of Illinois at Urbana-Champaign
H/T Nikon Rumors
Circadianreflections Blog 