Was able to rent a 5D while in LA for a still and film shoot. Here's a quick video sample. I was very pleased and was definitely the envy of everyone on the set.
Canon 5D Mark II
Custom Monochrome setting (slight increase in Contrast and Sharpness, plus sepia)
Other than downsizing it in Quicktime, I didn't treat this at all. For that matter, it's exactly what it looked like in the live view monitor.
Should have my own to play with by the end of the month. <Finger's crossed>