I found these cool articles about talks at GDC that I think people may enjoy. First, how BioWare is designing their game in an iterative fashion. http://malvasiabianca.org/archives/2009/03/gdc-2009-friday-bioware-talk/#postcomment And second, Everything I Learned About Game Design I Learned From Disneyland. http://mrbossdesign.blogspot.com/2009/03/everything-i-learned-about-game-design.html The 2nd one is only slides, but you get the jist of it. Also, while it may be more useful for narrative games, I feel there's nuggets of goodness for all game and map design.
