Eye of the Storm has a post on account security:

After two more guildmates got hacked last week, I decided to check and change my account security. I’ve used an authenticator since shortly after they were released, which I think is 90% of the protection that can be applied.

The other 10% is a combination of obvious email addresses, spyware, and repeated passwords for different purposes.

Here’s the rest: Account Change to Avoid Hacks

My son’s account has been hacked twice, recently. The first wasn’t so bad. They leveled his DK to 80 and he was able to get his stuff back from Blizzard. He stopped the second before any damage was done.

So we now use the authenticators and I think I may change some account data.

Amazon.com has the authenticator for $50 (!) but if you want to save a few coppers you can get yours from Blizzard for $6.50 (no, that’s not a typo.) Click here’s for the Bliz store.

It’s easy to use. You’ll connect it to your battle.net account (directions are included with the device) and then, every time you log in, you’ll be prompted for the 6 digit code the the authenticator generates. Enter that and in you go.

Blizzard, as you may know, has a widget called the Authenticator. This is a hardware device that makes it very difficult to have you account hacked.

ExNovis has a write-up about it and answers the “Yes, but is it really secure?” question:

So the Blizzard Authenticator is back on sale, even after a day of being sold out. This time, it’s available in more countries and it looks like Blizzard understood there would be a huge demand for them. I bought one for myself, and for my partner, Cantara. Sometimes, I get teased from people about ‘wasting money on a device that doesn’t provide total security.’ Well folks, Blizzard has stepped into the fray of the debate and confirmed, yes, the authenticator is secure!

Here’s the rest: For The Last Time, YES, It IS Secure