Lately I've read about an uptake in hacked accounts, and of course the recent chat about the Blizzard Authenticator (link here: http://www.blizzard.com/store/search.xml?q=authenticator). The authenticator is 6.50, with free shipping within the US, and you have to pay for shipping to other regions.
The authenticator is by no means a guarantee of security for your warcraft account, but it is a good measure, on top of smart browsing practices and regular security measures should make your account that much bit harder to hack. If your account has been hacked in the pass, of course before putting the authenticator onto your account, is first get your account back, change your email account password from a known safe computer or change your warcraft account email all together to a 'clean' e-mail account (this is usually the primary reason why accounts get hacked again and again, they get the new info via your e-mail account), and then change your warcraft password, also from a clean computer, then register the Authenticator for that account. There has been 'alleged' cases of hackers who still have access to your e-mail account, getting access to your wow account and having blizzard removing the authenticator, and thereby re-hacking the account.
With all this being said, are you getting one? What do you think about them? I'd like to know, and I'm sure the rest of us do to.
**edit**
I forgot to add I'm getting one for the extra peace of mind, and I am also getting one for my brother for christmas.