Jeff, thank you for this post, and the new vocabulary. The down side for me (in SO as well as in gaming) is the addiction: in the last few month I've became addicted to the StackOverflow game - posting answers at supersonic speed, reloading the page constantly to see my reputation and badges go up (I even started writing my own notifier). I can justify it be saying that I learn new stuff, and my communication skills are getting better and my English (not native) too, and that I can probably stop it when I want (or when I'll reach 10k reputation). Maybe the next SE site should be something like AA-SO...