Well, I am feeling so encouraged! 45 minute run tonight, I did my "ladder" training, trying to improve my conditioning. I am actually pretty happy with the shape that I am in going in to training. Let me correct that, the "shape" I am in, not my actual shape :)
My hip flexor was fine until about 38:30, I had to walk the last 6 minutes because I just couldn't run. Jeff gave me some really good stretches from his track days and I hope that it helps, 26.2 miles is going to be miserable with a hip flexor that hurts after 38 minutes!