Richard Dawkins has some interesting things to say about the topic with his series "The Root of All Evil".
Part 1:
http://youtube.com/w/Richard-Dawkins...search=dawkins
Part 1:
http://video.google.com/videoplay?do...02357039658996
Part 2:
http://video.google.com/videoplay?do...99165547892433
They're about 45 minutes each and have a lot of great arguments. The issue comes down to the fact that Dawkins is such annoying that it's hard to separate the emotional response from the logic.