Given the precedent set early on with for-pay customization items such as gamer pics, the fact that MS might charge for more "exotic" Avatar extras certainly doesn't surprise us. We also wouldn't be surprised to see free accessories created to promote upcoming games, films, and events, much in the way promotional game pics and themes are currently offered. So, that Spartan armor helmet? It'll be, oh, 100. But that totally radical Mountain Dew Extreme Sports Action Experience billboard hat is on the house.