Ask HN: Best books / lectures / lessons on game theory?

Check out http://academicearth.org/courses/game-theory.

It's real Yale course on Game Theory over at Academic Earth

Essentials of Game Theory (Kevin Leyton-Brown, Yoav Shoham) is a good introduction to the mathematics -- enough to scare me away from going any deeper and made me appreciate why people get Nobel prizes in this field.

If you have a practical application in mind (or something other than an urge to show off mathematical prowess), I'd recommend Bruce Bueno de Mesquita's new book, The Predictioneer's Game.

The leading introductory book is A. Dixit and S. Skeath, Games of Strategy, Norton, 2nd edition. It's a very good, easy read.