I've had a tendency over the years to view atheists by three types: the ordinary atheist who doesn't believe but doesn't mind if you do, the pondering atheist who wants to present his reasoning (as if always reevaluating his own thoughts) and the evangelical atheist who insists that nobody else ought believe in God. IMHO, the Newdow's and Lewontin's are evangelical - using every power at their disposal to influence others.
I would add a fourth type: the heretic. That would be similar to your pondering atheist, but I see it as someone who rejects creeds rather than someone who rejects God.