There's an interesting short piece from celebrity atheist Christopher Hitchens over at Slate describing the lessons he's learned from debating people of faith (particularly Douglas Wilson).  You can read it here.

I haven't yet run into an argument that has made me want to change my mind. After all, a believing religious person, however brilliant or however good in debate, is compelled to stick fairly closely to a "script" that is known in advance, and known to me, too. However, I have discovered that the so-called Christian right is much less monolithic, and very much more polite and hospitable, than I would once have thought, or than most liberals believe.

Wilson isn't one of those evasive Christians who mumble apologetically about how some of the Bible stories are really just "metaphors." He is willing to maintain very staunchly that Jesus of Nazareth was the Christ and that his sacrifice redeems our state of sin, which in turn is the outcome of our rebellion against God. He doesn't waffle when asked why God allows so much evil and suffering—of course he "allows" it since it is the inescapable state of rebellious sinners. I much prefer this sincerity to the vague and Python-esque witterings of the interfaith and ecumenical groups who barely respect their own traditions and who look upon faith as just another word for community organizing.