There's lots of us!

American Atheists
Americans United for Separation of Church and State
Atheist Alliance
Alabama Atheists
Atheist Net
Atheist Parents
BBC Religion and Ethics
Charlotte Atheists & Agnostics
Council for Secular Humanism
Evil Bible
Flint Atheists and Humanists
Freedom From Religion Foundation
Freethought Association of West Michigan
Godless Geeks
Metroplex Atheists
Michigan Atheists
Michigan State University Freethinker Alliance
Mykeru
National Day of Reason
Religion Lies
The Brights
The Secular Web
Western NC Atheists
Yahoo Group-Michigan Atheists