I recently found that there are now two other blogs about teaching game design:
Boardgame designer and professor Lou Pulsipher has a new blog at http://teachgamedesign.blogspot.com/,
and game programmer Mark Doughty apparently created a blog at http://teachinggamedesign.blogspot.com/ (although this one is currently inactive).
I'd like to welcome these new players to the field. (I say "new" somewhat tongue-in-cheek, as Lou at least has been teaching far longer than I have.) I originally started this blog because there were no other resources for teaching game design on the Web; it looks like pretty soon there will be!