Did a quick search of this forum and this http://web.canon.jp/Imaging/eos1dm3/index.html link to Canon Japan's impressive dedicated web site for the EOS 1D Mark III didn't seem to be posted..
Well worth a look IMHO (especially the flash version).. Very interactive and some excellent samples of things like the ISO performance (same image at different ISOs etc... You get a real feel for the camera in action - lots of 3D moving images, actions etc. Work through the demo menus and look for the "Details" and "How to Operate" buttons that float over the screen a lot - they give lots of extra info (like how the 63 zone metering works etc) in a simple visual way
I need a 1Ds Mark III... I'm in deep deep trouble....
But then sometimes trouble is worth it