[req2]

Twitter has allowed for a focused elucidation of a tiny concept. It bridges the gap between the line-by-line nitpick of an article and the 'so-short-it'd-be-flippant-elsewhere' single line nitpick.

It helps that this is a small twitterstorm with a bunch of seasoned professionals, but the following seems like a slightly more asynchronous IRC convo: http://orbit.vect.org/misc/gamedesign.html