As far as I'm aware, the Blizzard Authenticator operates using RSA tokens. While I doubt any group with the sophistication necessary to pull off a successful APT attack on RSA would be interested in World of Warcraft accounts, I do have my concerns that the people responsible may publish their findings and the keys generated by our authenticators may become useless.
I realize it's still early in this whole deal and that even RSA doesn't know exactly what happened or what all was even compromised. I just wanted to share my concern.
I didn't want to link directly to any articles, but you can find any information on this you want with some basic web searches.