For what it's worth, I don't believe in any higher being or omnipotent creative power. I'm in Polly's camp.
I see no logical reason to replace a lack of knowledge about the origins of the universe with an anthropomorphised creative being, and I don't really see why it should be seen as the norm to - especially in a society in which science and objective reasoning have such standing. There has never been any evidence to suggest a creative power in the way we assume.
One such argument surrounding consciousness can be likened to this situation. For centuries (referring only to the musings on consciousness), and still even now, the writings of Cartesian Duelists (ie: Descartes) have been the accepted paradigm: that there is an immortal soul in a material body, and that this soul is the objective experiencer of our subjective experiences. To describe it in a way that you could picture easily: a little person sitting in our mind, watching our vision on our screen and listening to our hearing through headphones, controlling our body through a control panel. This conclusion mainly came about through a tug of war between religion and the newly forming natural sciences, and is slowly being seen as a complete fallacy. It's wrong, and it's only wrong because we tried to understand something that we had no idea how to comprehend, which is exactly what happens with religion and creationism. Read up on the Cartesian Theatre to get the full picture of my badly written synopsis, preferably by the works of Daniel Dennett.
Coming from an evolutionary background, I see spiritualism simply as a behavioral trait within our (and a select few other) species that simply improves our ability to survive and reproduce within our environment. Like EVERYTHING about our physiology, it's only as good as it needs to be for us to survive, and is in no way perfect or objective. The same is true for vision, sensory functions and consciousness - we're limited in our own function without even being aware of it, because we assume that our experiences are objective windows to the outside world - which they most certainly are not.