The tag badge system seems to be inactive at the moment. No gear icon appears next to the privilege tracker for me on my main user profile (which would be used to switch it to tracking a tag badge), and everyone's meta profile only shows their reputation, not the tag badge tracker. Additionally, it looks like I should have a bronze discussion tag here on meta, but no such badge has been awarded.
Meta here (my profile):
Meta Super User (Mokubai's profile):
This isn't urgent by any stretch of the imagination, and it could conceivably be by design during private betas (though I couldn't find an MSE on it), but I'll file a bug just in case.