This is a positive initiative. I have only one issue with it, which is that the mailing list is on Wikimedia's servers, while the wiki is not. While we all trust you, of course, to do the right thing, as a matter of fair play towards others with similar ideas, it might be sensible to either host the list separately, or to move the wiki to Wikimedia's servers. Users might also be confused when they subscribe to a Wikimedia mailing list but their Wikimedia username doesn't work on the wiki (I'm speaking about the hypothetical post-single login world ;-).
If I was a woman I would probably start a long thread about being referred to as a member of the genus "chix," but I'm not, so I'll leave that to the "chix" to figure out. :-)