I just looked at the Badges page on Meta Stack Overflow and the Fanatic badge is strangely absent.
I suspect that it's been intentionally ommitted as the Fanatic badge was announced before Meta Stack Overflow went live, and Super User, which was launched after Meta Stack Overflow, has the badge (though it hasn't been awarded yet). It now sounds like this could be an oversight, since the Fanatic badge was only added to Super User yesterday.
On the one hand, as a user that would be a recipient of the gold badge I'm inclined to request that it be added, but at the same time I can understand that Meta Stack Overflow has a different dynamic than the rest of the sites. It's obvious who the daily contributors are, so the existence of the badge might be redundant.
Should Meta have a Fanatic badge, or is the Enthusiast badge enough?
P.S.: I'm not posting this for purely theoretical reasons - today would have been the day that the badges would have been awarded.