I had one of my accounts hacked some months ago. The job was done very "cleanly". All that could be sold or DE'ed had been, and one of my characters (level 80 hunter) was apparently used for illegal stuff (teleporting here and there, I could "track" him from another account). For the rest, everything was left intact.

I still don't know how they could not get all my five accounts, though. They had plenty of time, account names were (still are actually) almost identical, passwords were the same ...

Anyway, Blizzard did a great job at restoring everything, and it went fairly fast. In 3 days, i was up and running. So, message of hope to the OP : it will end good