I'm right there with you - 4:00 a.m. seems to be the time my brain wants to wake up and be obsessive.

As to your full moon theory, I think it does have an impact. As a teacher, I've noticed that during a full moon, the kids are moodier, edgier and generally more hyper and distracted. Maybe it has something to do with the gravitational pull - after all a large percentage of our bodies are water - which would be effected by gravity, right? Or maybe not.