I too am interested in what Pentax might come up with for medium format. I have a complete Pentax 67 outfit with an array of lenses that I would like to use. I have heard that the Pentax Digital will be in the 18 MP range. I wonder how a medium format digital might compare to the files produced by the Canon 1Ds Mark II. I may just end up going with the successor to the 1Ds Mark II.
It looks like Pentax is moving to a Kodak sensor with 30 megapixels,
which is the same size as the 18 megapixel sensor first announced.
I'm hoping that the raw files will be 16-bit. If so, then I'd expect the
image quality to be competitive with MFDB's.
Having a bunch of Pentax 645 lenses, I'm very eager to hear when this
thing will be available. I sure wish that more information were forthcoming.