I'm also an admin at a few dozen wikis, so you may have come across my name that way, but if you're looking for a real admin, I'm probably not your guy. Half of the wikis I have adminship on I barely know to be honest. I know their technical setup and design in and out to be sure - but not much of the content - or the crowd.
You'll find code of mine all over the wikiverse. Some of it is specific to certain wikis, but some of it is public and you might find it useful as well. Either for yourself or for your wiki(s). Most of my general purpose code resides at the Developer's Wiki. Here's a - slightly incomplete - list of projects I've been involved in:
Projects I've started:
Other people's projects to which I've contributed or that I maintain:
And in case you were wondering, my avatar is Krazy Kat ;)