Those are some things I'm thinking about right now. Also, I think a post about "how to design a great game" would be a good one. As in, how many different takes there are on that floating around and what the meta-takeaway from all of them might be (EG, nobody really knows how to design a game, so the best approach is one of experimentation.)  

 Also, ethics in game design is a topic everyone should be discussing. A lot.