I was quite amused by the metaphor collision that's taking place, though. It seems that some people find that the best way to move forward the craft of software development is to head down the dojo for some sparring. I'm far form convinced that either of those metaphors is much help by itself. To see them embedded in one another makes my head spin.
I look forward to the day when we feel secure enough as an industry to have a programming conference where people's ability to do programming is improved.