#1 - June 18, 2010, 10:10 a.m.
I see where you've changed your password, and that authenticator is no longer on the account.
Do you know how they got hold of your password and ID?
That is going to be vital to keep this from recurring. Actually, looks like they may have been in far longer than you know, looks like back on the 13th there was very brief access, although they may have just been taking inventory.
Right now, security and recovery are going to be the main focus here.
This sticky may be useful.
Account Hacked? Security Issue? Look Here!
http://forums.worldofwarcraft.com/thread.html?topicId=24702231244 You may also want to look into getting an authenticator for your account. It's no substitute for good security habits, but it will help keep them out of your WoW account.
Blizzard Store
http://us.blizzard.com/store/browse.xml?f=c:6 Mobile Authenticator
http://us.blizzard.com/support/article.xml?locale=en_US&articleId=26109