Mamiya will ship their 22-megapixel digital ZD camera this summer for US$24,400. There's the camera body at $12,600 and the digital back with 36x48mm sensor at $11,800. Add to that the cost of the lenses.
That sensor is big. As mobilemag reminds us, "In the land of digital cameras, a bigger sensor means better quality pixels. Most consumers don't understand this concept and are constantly getting excited by companies shoving more megapixels into the same size sensor."
For those who whine that the Canon S1iS's 3-megapixel resolution should be higher, think more pixels crammed in the same space = poorer quality images.