This is only slightly WoW-related, but it's worth a mention, I think, considering that when it happens, you'll be able to tell all your friends just what these things are. Our good friend Relmstein reports that Visa is planning to put an authenticator, of all things, in their credit cards. We of course all know how the Blizzard Authenticator works: you punch a button on the Authenticator, it gives you a code, and then that code can be used to synch up with the server. The Emue Card that Visa is testing right now works the same way: you punch in a PIN, it'll give you another code to enter on an online shopping site, and thus no one who just gets your card information can actually use your card (much like right now with a Blizzard Authenticator, no one who just gets your password can actually sign in). But it's all built in to the normal credit card.
Very interesting. What Visa's doing with their credit cards might not be completely relevant to WoW, but it is relevant to note that of all of the accounts and passwords in your life that you might like to keep secure, a Blizzard account with an Authenticator attached is probably the most locked-down. Companies have started using Authenticator-like technology to have their employees log in to local networks, and obviously credit card and banking companies are testing things like this. But when it comes down to actual widespread usage, Blizzard is way ahead of the curve. Odds are that your WoW account right now is even more protected than your checking account. We'll likely be using the same authenticator system for other secure connections in the future.