I'm hoping for an authenticator other than the ridiculous lava one. How am I supposed to carry this around on my keychain?

Something like the black/lightning blue tiger stripes I've seen somewhere or the straight black like the battle.net authenticator page.

Where can I get one of these? I'm nerdy enough to need one, but not nerdy enough to be seen with one :(

Currently you can purchase the corehound version of the physical authenticator only on the Blizzard Store. Other than that, perhaps it's time to get out a glue gun and the Swarovski crystals for some extra bling?