Who said medium format? Can't see anything especially 'medium' about this beasty - Seitz' 6x17 Digital takes on the panoramic 6:17 ratio that has graced many a rare panoramic film camera from back in the day.
A whopping 160megapixels offers a 7,500 x 21,250 pixel resolution - and at a file size of 1GB per shot to boot! Your SD card isn't going to be a great deal of use here - but the back scans at 300mb/second - making it the fastest existing digital back in the world. Read the whole article here