Mainstream religion, and much of American culture has marginalized and misrepresented atheism so far. But evangelizing atheism is equally as creepy as evangelizing religion. Which isn't to say it isn't a bit creepy.

Atheists tend to be united only in what they don't believe more than in what they believe. But I think that an organization that can state to the world that a moral compass can be provided by reason just as well as religious dogma has a place in society (if that is what this is about.) Its "what this country was founded on:" http://en.wikipedia.org/wiki/Age_of_Enlightenment

... despite the best attempts of some right wing Christians to convince us otherwise. Reason may as well be defended, but like any morality, it is just what an individual believes.