>Does anybody know the reason why Nikon decided to use two >different types of memory cards in the same Camera ??
Great question! I've been wondering the same thing. Why, on earth, support SD cards in a camera like this? CF cards have much greater throughput than SD cards do, and given the amount of data this thing will be churning out, I would think at least CF cards, and maybe even the new format supported by the D4. Now that would be a nice combo, CF and that new format the D4 supports.