I was a fat slug over the holidays but I'm getting back to it. Running everyday, and lifting every other. I need start lifting everyday alternating between upper and lower body. That race might give me a little kick in the a$$ to step it up.
Have you thought about barefoot running? I've had great success with it (I have minimalist running shoes from Merrell) and thought it might help you as well.
I crashed my motorcycle a few years ago and now ride a titanium rod. They drove the rod through the center of my tibia and had to go in through the knee. When I got done with PT and started running again my knee hurt and I was limited to only a few miles. I was starting to get concerned about the damage I might be doing to the knee so I did a little research and found out about barefoot running. It's given me the chance to really run again and I don't have any knee issues at all.