#13 - April 11, 2009, 6:35 p.m.
Although you changed your previous email's password following your first compromise, Evilmuffin, it's still possible that the physical address was known. This element in conjuction with a lucky SQ/A or CD key guess may have left your account vulnerable.
With that said, if you've followed those recommendations provided within our two stickies in full, you've bolstered your security significantly. Stick with those scans and run them weekly. Keep checking our online store for incoming shipments of Blizzard Authenticators (early morning hours are usually best) or, if you've an iPhone, consider downloading our Mobile Authenticator application. Also be sure to keep your new email as isolated as possible.
You're taking a proactive approach to this incredibly frustrating situation, and I do applaud you for it. I assure you that our staff will work diligently to get you back on your feet and your account in working order once again. If you've any questions in the meantime, though, please let me know. I'm here for you and happy to help.
PS - Be sure to confirm that email change, too. Your new email won't be fully registered until you do. :)