One thing Olympus did right with the E-3 (came to Canon after that) was the weather sealing.
I've seen them dunked in seawater, hosed down (with a lens attached though), water poured on them from a bottle, showered and buried in snow/sleet and no problems. And if I remember correctly they even took an underwater shot with the newer E-5 by just dunking it below the surface.
Let's say that I never worried about my camera in a light rain like I do with my 7D which is supposed to be quite well sealed, but not that well. For example the card door sealing isn't convincing me too much. I have been thinking about moving up to older 1D series cameras, probably 1D MkIII and 1Ds MkII would serve my purposes well.