I got my wife the 13" Air for our anniversary, with the upcoming WoW expansion in a couple of months she is now considering going back to the game. Is anyone running it currently on the 13" air? if so what is the performance like at 1440x900? Also if anyone has tried the beta of the expansion any advice would be greatly appreciated. The reason I ask is that the game is a huge download these days and would take about to day to fully install and patch and I don't want to go through that on her macbook if I don't have to! Thanks!