The Mailman wiki (http://wiki.list.org/%3E has been getting some much needed attention lately. In addition to the additions and cleaning up http://wiki.list.org/RecentChanges that has been and is still going on, there have been a couple of software changes since the initial move to MoinMoin.
The wiki was initially running on the Ubuntu python-moinmoin 1.9.7-1ubuntu2 package. It is now running on the MoinMoin 1.9.8 source distribution.
There is a change log at http://hg.moinmo.in/moin/1.9/file/1.9.8/docs/CHANGES, but we don't know which if any of the changes might have been backported in the Ubuntu package, and we don't know what Ubuntu package specific things we might have undone.
Noticeable changes at this point include a choice of the text or the GUI editor where previously only the text editor was offered (you can change this in your preferences) and a few bug fixes.
The wiki is also now being served through mod_wsgi which may result in faster response, but probably won't be noticeable.
Otherwise, the wiki should be working the same as it has been since the initial move to MoinMoin five weeks ago.