WoW Insider has found information on the Battle.net Support page that indicates an authenticator app may soon be available for your iPhone, iPod Touch, and other mobile devices.

Like the physical device the app is expected to be linked to a Battle.net (previously just World of Warcraft) account and provide an extra level of security by requiring a six digit code to be entered when logging in.

No information is available as to when the mobile authenticator will be available, how much it will cost (current device is $6.50), or what phones will be supported. The iPhone and iPod Touch are the only things specifically mentioned.

If you visit the download link, the US/EU option is disabled however there is an active option for Korea. Anyone available to give it a try?