While checking some facts about Islam for a discussion with a friend today, I re-encountered this exchange between Sam Harris and Andrew Sullivan on Beliefnet. It's several months old, and I'd seen it before, but I had to preserve a link.
It's long, and involved, but I think the arguments on both sides are just dazzlingly eloquent. It is among the most interesting exchanges on any topic that I've ever read in the blogosphere, and among the best about religion that I've seen anywhere. I am not much surprised (both of these guys are very sharp) but I'm still in awe.