World of Warcraft and Philosophy got released a little while back -- it's a book by Luke Cuddy and John Nordlinger that examines WoW-related topics like roleplaying and the Corrupted Blood plague, and ties them into philsophical ideas and thinking. TechFlash has now posted an interview with Nordlinger, and it's a good read as well. Nordlinger says that one reason they chose to talk about World of Warcraft in this way is that it's so incredibly big -- when you have 12 million (give or take a few at this point) people playing a game with a GDP larger than some smaller nations, you're going to touch on all sorts of interesting ethical, moral, and other philosophical ideas. He says the book has been pretty popular, and a few universities are currently considering teaching courses based on the material, not only because it's interesting, but thinking about the game in this way helps improve abstract thinking in general.
And perhaps most interesting, he says that reading the book could help players better make ethical and moral decisions in the game. Just ninja-ing the mount from an Onyxia raid might not mean much to you, but when you look at the bigger picture, and what those actions mean for ethics in general, Nordlinger says the book might help players "make more aware decisions, if not different decisions." Of course, in practice, trying to explain higher philosophy to ninjas might not have the desired effect, but it does seem true that exploring the higher meanings of this game and the intents of the people playing it might put a little more meaning into the pixels as well.