Quick couple questions for you users of the 1D Mark II... I came across an ad on here of a user willing to trade a 10/10 condition 1D Mark II for a 60D. I recently purchased a 60D and while I love the camera, I'm curious on a couple things about the 1D versus the 60D. The increased image sensor size making it a 1.3 crop will ultimately give me a few more mm's of usable coverage with lenses versus 1.6 crop correct? Also, adding an L series lens creates some sort of weather sealing with the system, from what I understand. And lastly, can anyone confirm the high ISO performance of the 1D, and who has also used the 6oD hopefully. I know I'm asking alot here but I want to make as informed of a decision as possible.

I can't speak for the 60D, but I did have a 50D for a while before upgrading to the 1D2. I have not looked back since. You do get a few more MM's of perceived coverage, someone else will have to explain it. But the 1D2 does shoot a tad wider than the 1.6 crops.
Some of the L series lens do offer weather sealing. I've shot mine, with the 70-200 f/2.8L IS in rain and have had no problems. I used to have a link that showed which L lenses had weather sealing. Maybe try Googling it.
As for high ISO, I'm very pleased with the 1D2. That is about the only thing I miss from the 50D was the ability to shoot ISO 6400. The 1D2 performs very well at high ISO's, IMO, but there are some who are more picky than I. I personally think the 1D2 cleans up the noise much nicer than my 50D. Here is an example shot at ISO 3200:
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