User Feedback based design, and Biometrics

I’ve become very interested in “redesigning the game, after I gather mass of data.”
(I guess it’d be neat to change a game on the fly while gathering usage feedback, but since the tools I would use aren’t going to be widespread anytime soon – much more interested in iterating on a game which can end up widely distributed).

Valve Developer Commentaries (idea)

After reading Brandon Sheffield’s recent interview with Erik Johnson at gamastura, I had idea (might be a poor idea…):
It’d be charming/funny if Valve offered Easy, Medium, and Hard commentaries.