One commenter, Damion, referred us to his Agnostic Popular Front blog - which is a running commentary on debates between religious believers and non-believers (or broadly analogous protagonists such as people with different views of biological evolution). So, I give him a hat tip - I didn't know about this resource, and I've got to say that it's an interesting one. It's not a place to discuss debates, since it doesn't have comments, but it's a creative use of the blog format, with information, and what seems like an informed opinion, on numerous debates dating back to the 1970s.
These are not all formal debates such as we've been talking about over the past week of so, but also include various less formal discussions, interviews, etc.
I could find it providing many hours of fascinating reading.