I don't presume to have inside knowledge of anyone's motives, especially Glenn Beck's, but I believe most of us were once neo-conned. When we "saw the light" it drove us into deeper research and toward the path to liberty. We ended up here and elsewhere fighting for the cause of liberty.
You can take two approaches to this news:
1. Assume his motives are disingenuous (there's plenty of reason to believe this)
2. Assume his motives are genuine and he has finally seen the light.
I personally would start with #2 with the addition to wait and see where he goes from here. It should be obvious based on what he says from here on out whether or not this is genuine.