The ikiwiki project strongly encourages collaboration through ikiwiki itself, and thus does not have a mailing list. Anyone can create an account on ikiwiki's own wiki. ikiwiki provides a [[bug_tracker|bugs]], a [[TODO_list|TODO]], and "discussion" sub-pages for every page. ikiwiki developers monitor RecentChanges closely, via the webpage, email, and [CIA](http://cia.navi.cx), and respond in a timely fashion. You could also drop by the IRC channel `#ikiwiki` on OFTC (`irc.oftc.net`).