My friend, Larry Brodahl, sent me a classic article debating Extreme Programming vs. Interaction Design from both of their visionaries. I would love to see more debates like this. I wish they would have continued this discussion. It felt unfinished. It was a great debate! We should always be interested in doing things better. And that is what these types of discussion allow. They make us look at what we are doing and question what is not working.
By the way, if you have never read "The Inmates Are Running The Asylum", you need to now! I can't wait to read "About Face 2.0" now.