Speaking from experience, nothing sucks quite as much as logging into your World of Warcraft account to find your carefully cultivated level 70 character naked as the day he was born. Blizzard feels our pain, and has applied the magic of technology to the security issue to create the Blizzard Authenticator, a keychain device that generates a six-digit passcode that you can link to your account via serial number. Once the device is linked you'll have to enter the code from the Authenticator ever