In fact 5D is actually modelled closely after the 30D body...except the bigger size and different shaped pentaprism housing, both bodies are quite similar in design and both sport the same 2.5" LCD screen. From far, quite hard to tell them apart (esp from the back view).Hmm. I'm still puzzled as to why everyone is being so picky about the 5Dmk2 being a bigger 40D with fullframe sensor when in fact, the 5D is essentially a 20D body + ff sensor & bigger viewfinder.
Well not to start a flame war but its because of the specs of a certain D*** model released recently...