You know, to tell you guys the truth, I nearly went with Olympus when I was considering my first DSLR purchase. I kind of liked their completely weatherproof design. I'm pretty clumsy sometimes, so I thought it might be handy.
But to the extent that I use my camera, I wouldn't have needed to use the weatherproofing to the extent of the Olympus cameras. And I'm glad I didn't, they dropped the 4/3 and went micro 4/3 not so soon after.
And as I noted earlier, the worst my camera has been through was a light drizzle and some pretty cold weather. Not the worst, but to say the least, it held up just fine.