While I don't usually link to these debates, this is one of the better ones I've heard. There's a video around somewhere too (only streaming, unfortunately).
Audio version:
http://rs276.rapidshare.com/files/81509657/SamHarrisDebatesRabbiDavidWolpe.mp3
Some themes will be familiar. Some of us here have gone over these arguments again and again in this forum. I think until people see they are using bad arguments, these same topics will be brought up.