http://www.geek.com/articles/games/blizzards-chinese-gm-quits-after-large-data-breach-2010126/
Haha
On a related note, I'd suggest changing passwords because they aren't saying who's or what acct data was stolen.
I'd also suggest creating a new e-mail account & changing the account associated with battle.net--especially if you don't have an authenticator attached.