Stick to it. As I've posted in my thread on this (
Link), it took weeks before I started to see a noticeable weight drop. now 3+ months into commuting, I'm starting to get the "have you lost weight?" comments. In fact, I've dropped almost 20 pounds now. Just stick with it.
As long as you're not gaining weight, you're probably doing just great already by putting on muscle in your legs while you're dropping fat from areas like your face and neck (generally the first areas where weight loss is noticeable).