I'm again teaching the teleological argument for God's existence in my MCCC Philosophy of Religion classes.
I re-looked at the Time interview with Richard Dawkins and Francis Collins and again found it helpful and interesting. Here you have an atheist (Dawkins) who is, it almost seems at times, incapable of believing in God, and a theist (Collins) who converted from atheism to theism. Both are scientists (with Collins being an actual scientist and Dawkins more of a historian of science).
It's a good read, and helps clarify some issues and some of the differences.