An interesting development: the God or Not Carnival. Its mission:
GOD or NOT exists to bring theist and atheist thought on a variety of religious issues together in one place on a regular basis. The goal is threefold. First, neither side can hope to make any progress without fully understanding the opposing viewpoint. Second, understanding defuses animosity and eliminates misconceptions. Third, there are plenty of people out there who are "on the fence" when it comes to god. We hope that this Carnival can help them make up their minds one way or the other.
It alternates at atheistic and theistic sites. The first God or Not Carnival, on the subject of sin, was at Skeptic Rant. The next one, at Eternal Revolution, is on the topic of proof, and will take place on November 7th.