I suppose I should respond to the question itself:
I've yet to see any concrete evidence which suggests to me that a god is necessary to explain the workings of the universe. There are certainly plenty of unknowns, particularly when we're talking about the origin of reality as we know it, but a lack of answers does not imply a god -- it simply means that we, as a species, are still ignorant about many matters. As such, I do not believe in a higher power, and will continue to function this way until I see evidence for the existence of such a being.