@edgarblythe,
Atheist progressive eh? Why not just call them progressive. Someone's belief that there isn't a god doesn't doesn't have anything to do with whether they are progressive or not.
I know people that don't believe in God, but do believe that public display of religion is a net positive for society and for many individuals. These people are offended by the attempts to remove religion from public place (even though they don't believe in any deities themselves). Are they atheists?
I know a person who doesn't believe in God who is a practicing Catholic (I don't understand this) but she goes to Mass, takes communion, all while not believing. Is she an atheist? I know several practicing Jews who also fall in this category, attending synagogue and adhering to the tenets of the religion (my impression is that this is not that uncommon). Are they atheists?
You can't have it both ways. If you really want a strict definition of atheist as someone who doesn't believe in any god, then you need to acknowledge that this is a designation that is so broad that it is almost useless. There are atheists who don't mind God on money or religious displays on public squares. There are atheists who believe that abortion is wrong and who don't support gay marriage.
As soon as you start an organization with a set of goals or beliefs (beyond the one very narrow belief that there is no god) then you have something beyond an "atheist group".
You don't have to be against religion in the public square to be an atheist. In fact we shouldn't use the word atheist to describe people who are against religion in public-- if you do then you are contradicting your own definition.
This is the problem I have with people who call themselves Atheists. They tend to have goals that go far beyond the simple "non-belief" that doesn't drive them.
It is the dishonesty that bugs me.