When can I get a hold of an authenticator?

Q u o t e:
Just tried to buy one on the Blizz Store and they're apparently sold out. Any estimate as to when they'll be available again?

I don't have that information, Sylanux - but hopefully soon.

When these were new we ran out of stock on a semi-regular basis, but it's been months since this has been the case. I know we do our best to keep them in stock.

If you have one of the supported mobile devices, you might consider the mobile application, otherwise, I'd check back with the store early and often.

Mobile Authenticator
http://us.blizzard.com/support/article.xml?locale=en_US&articleId=26109