#4 - Aug. 7, 2010, 11:14 p.m.
It looks like you were able to get through to Billing and get that maliciously applied Authenticator removed, Shadyness.
In case the Billing Rep did not tell you it looks like they already forwarded your case for investigation. You should be contacted in the next day or two with the results of your investigation.
In the meantime, please review the following links for information on keeping your account and computer security.
Battle.net Account Security Awareness
http://us.battle.net/security/
Account and Computer Security
http://us.blizzard.com/support/article/30794
How to Identify Fake or Phishing Emails
http://us.blizzard.com/support/article/25133
Battle.net Authenticator
http://us.blizzard.com/support/article/24986
Good luck!