This game is bad effin news as it is now. I've played diablo 3 with 5 friends that live nearby who are new to Battle.net and 2 now have had their characters stripped and needed a "rollback"
Blizzard absolutely should be providing these "authenticator" dealies in the box with the game, because it's sure as hell the only way a person can have even semi-confidence in the security on Battle.Net. The place is a cess-pit of hackers and World of Warcraft lifer "Blizzard defense squad" Bobby Kotick knob-slobbers.
They are issuing refunds to people who are not satisfied with the game within 30 days though. I just don't know that I care to exert the energy required to give 2 fucks about anything going on with this game now..
Though I *did* uncover this little gem of an application for windows users that basically allows you to use the mobile authenticator app's functionality on a windows PC:
It's legit and works well, and for those of us that dont give a shit about smartphones or shelling out $7 more to Blizzard/Activision after paying $65 for the game, just so we can have any semblance of security on *their* service.