I made a quick pass through all the curves in the graph editor, took about two hours to just go through and smooth out some things, get rid of some little hiccups and make the tangents on both ends go into each other nicely.
I also added some subtleties that are really hard to see, like his belly getting bigger and smaller throughout the whole shot and there was a breathe control that I was messing with. It doesn't really look like he is breathing, but it does help to give his chest a subtle rubbery feel that I like..
I'm still thinking about what I'm going to do with the hands. I've also been thinking about doing a completely different walk or run cycle with this same guy.