Also, one of the bigger US based online poker sites started accepting bitcoin as a deposit option, and probably a bitcoin withdrawal pretty soon as well.
http://www.parttimepoker.com/winning-poker-network-adds-bitcoin-as-deposit-method

and a little older news, Zynga is accepting bitcoin too..
http://www.rawstory.com/rs/2014/01/06/bitcoin-back-over-1000-thanks-to-online-gaming-company-zynga/