First time poster - but I've been listening to the Atheist Experience for a few years now. Great stuff. Anyway, this is last minute definitely, but I thought you guys may be interested in the debate between Sam Harris and William Lane Craig tonight at ND (I'm a freshman at ND - there's quite a few atheists here even though it's a Catholic university.) Harris will be arguing that science can explain the existence of moral behavior, and Craig will be arguing that only divine revelation is the source of morality.
The debate will be streaming in an hour and fifteen minutes - 7 o'clock EST on ndtv.net. Check it out if you have time tonight, but if you don't, the debate will be on youtube shortly after.
Thanks for reading!