@hingehead,
As Dr. O'Hair appears to demonstrate, for some, perhaps many, perhaps most (I dunno) there appears to be more to the "atheist" position than mere a-theism.
Compare a person who we might call "apolitical," for example. Such people generally simply "take no interest" in politics. They don't know who's running for office and they don't care. They just don't want to spend time in their lives thinking, worrying, or caring about "politics," for whatever reason.
I've never seen a "club" for the apolitical, where they join to share, repeat, propagate and broadcast their views. They don't seek to "expand" the number of apolitical people. They don't try to convert people who get involved in politics to their way of thinking. They don't try to ridicule those who are interested in politics, etc. Politics in just not subject they are interested in.
It's often quite different for a-theists, though. There's something different, there.