This is all a bit overkill for a furry porn site isn't it?
I always thought it was a bit overkill for WoW, but they give 'em out for couch change...
Maybe they could just have admins register their computer to an IP or some other fingerprint, and then they have to do all their admin-ly things from that computer? You know, like your bank does?
If they were dead set on a physical second factor, then look at mOTP or FreeAuth. Both have soft tokens in the form of smart phone apps.
And you know, we've discussed all of this before...and it's for naught since we all know they'll ultimately do jack shit about security.