I've made myself mailing list owner of mediawiki-l and wikitech-l temporarily, since I don't think Brion is interested in moderating either of them anymore.
But it's a relatively simple task, and it seems to me that it could be done by someone with more spare time and less awesome hacking skills ;)
The tasks are: * Manage the mailman configuration for these two lists. * Put members on moderation if they post inappropriate content. * Deal with people who send administrative requests to the list or to *-owner@lists.
You can also expect to get some forwarded spam. Anyone interested?
-- Tim Starling