In a rather unexpected turn of events music-snob site Pitchfork has published an article about game music. There are a lot of interesting points, many coming from Peter McConnell of Grim Fandango and Psychonauts fame (among others).
"My experience with the iMuse system is we thought we'd invented this wonderful thing, and we rolled it out, and nobody really noticed," laughs McConnell. "The main point of adaptive audio is that you shouldn't know it's there anyway."
There's a lot more good stuff over at Pitchfork.