Atheist Only
A place for atheists to come to discuss any issue from religion, and social issues. Membership required.
http://groups.yahoo.com/group/atheist_only/

Atheist Empire
Atheist message board.
http://groups.yahoo.com/group/atheistempire/

Atheists Anonymous
Chat room aimed at promoting an understanding of atheism and the atheist.
http://www.geocities.com/atheist_anon/chat.htm

Atheist Bereavement Support
Message board for atheists who have lost loved ones.
http://groups.yahoo.com/group/Atheistbereavementsupport/

Secular humanism
Discussion group.
http://groups.yahoo.com/group/sechum-L/

Whatever Floats Your Boat
A message board for atheists, agnostics, and humanists.
http://p222.ezboard.com/batheism

Oklahoma Atheists
Message board for atheists living in Oklahoma.
http://p207.ezboard.com/foklahomaatheistsfrm1

Freethinkers Pub
A discussion board ranging from light conversation to support for recovery from oppressive, dogmatic religions.
http://p207.ezboard.com/bfreethinkerspub

Inquisitive Atheists Debate
A place for atheists, agnostics, and theists to share thoughts and concerns and debate.
http://p206.ezboard.com/binquisitiveatheists

Internet Infidels Discussion Forum
Forum with topics such as philosophy, existence of God and evolution vs. creation.
http://www.iidb.org/vbb/

Atheist vs Theist Debate
Discussions about religion, politics, and humor.
http://p096.ezboard.com/bavt

Keep It Real
A place for Realists (agnostics, atheists, and pantheists) to discuss philosophy, science, and spirituality.
http://p104.ezboard.com/bfuture