Topic: Battle.net account troubles
This is just to inform you that it appears people with inactive WoW accounts and SC2 Beta have been hacked, myself included. According to a forum post I was reading the OP found around 40 people in a similar situation.
All the people didn't have a virus/visit dodgy websites etc. Maybe a security hole in SC2?
I got this back from Blizz:
We are pleased to inform you that we have restored ownership of your Battle.net account to you. In addition to this, we have sent a new password to your email address. If you haven't received any email it might be due to a spam filter, please ensure that any filters currently in place on your email account are set to receive emails from noreply@battle.net. If you are unsure how to do this, please contact your email provider.
Our investigation has also been completed. It appears that there may have been a loss of items on your characters. We have made an escalation to the Game Master department regarding this, and they will investigate your account as soon as possible. Once the investigation has been completed, you will be contacted in-game.
So they hacked me, added an authenticator to the account, paid for some WoW gametime and stole items. WoW account is now locked while Blizz sort shit out. Sadly they have disabled the gametime and it ends today! I could have played some free WoW 
/rage 
tl/dr: Hacked, no fault of mine, inactive WoW, sc2 beta and you should probably get an authenticator now.
I change the forum completely every few months to get on your nerves
