Didn't see this posted on the front page of the MBA forums, so figured I'd share this link. If it was already posted my apologies.
http://kotaku.com/5842300/this-is-diablo-iii-running-on-my-macbook-air-without-breaking-a-sweat
http://kotaku.com/5842300/this-is-diablo-iii-running-on-my-macbook-air-without-breaking-a-sweat