I can't get away from a discussion of the intersection of--or the gaps between--morality, rationality, and theology. As I was typing, I remembered a similar three-blog discussion from a couple years ago, among Ed Brayton, Rusty Lopez, and Matt Powell.
In case you find this all very fascinating, here are some of Ed's posts (with links to the others), in chronological order.
The WorldNutDaily on Morality (the one that started it all)
Rusty Lopez on Morality
Another Response to Rusty on Biblical Morality
An Odd Response (wherein Matt Powell enters the conversation)
2nd Response to Matt Powell on Biblical Morality