My apologies if this is not allowed here, but I'm only posting it because I think people here will want to use it.
I figured I would let people know about Coursera's free online college, but only because they just started a free Game Theory course. Its free, no ads or junk mail etc...
Its not game theory in the sense that they are talking about Video Games or Board games, but they still discuss strategy, and this is something valuable for AI, and game design in general, and how to measure/define different strategies in certain cases.
As a game designer, I still found it quite useful.
Again I'm sorry if this is viewed as spam, and I wouldn't normally post something like this, unless I thought it was really valuable. They just started, and I think the latest you can join is Jan 20th and play catch-up.
They are talking about things like Nash Equilibrium, and how to determine the best strategy if you know all of your opponents potential strategies. Since it builds into tables, its pretty easy to apply these in an AI setting, but excellent to keep in mind for game design, so you can have these types of things to work out. Its purely educational.