Interesting thread. I was able to clarify my thoughts a bit from this discussion.
First, I find that I have no opinion about God. It isn't important to me. That means I'm not theist, atheist or agnostic. I really don't care.
Second, I don't think atheist is a scientific viewpoint. Technically, science is about the physical universe and "God", by definition (if you will), is outside of the physical universe. Technically, God created the universe and is, therefore, outside of it. That isn't my belief, that's just the way God is defined. Science can certainly "study" God if it wants to, it just won't accomplish anything.
I don't care what people believe about God. Whatever floats their boat. I have absolute no argument with any position.
But I see these three beliefs: theist, agnostic and atheist as religious opinions. Or anti-religious in the case of atheist. If someone has any opinion about God, that's a religious opinion. It isn't science - that's just silly.
My opinion only - from the outside of the discussion, if you will. I don't want to insult anyone or start an argument -- just stating my opinion.