nikon d3 is fullframe. but will automatically switch to crop mode when mounted with digital lens. same thing may work with new pentax... 2 camera for price of one
While the general statements were true when it was written, but a few bigs steps have been made and CMOS-based image sensors are quite mature. The bias problem has been more or less solved when Canon introduced D30 the 3MP SLR, and further improved with the 20D sensor and Sony's new batch of CMOS sensors.