Status: this will be the primary focus once the source code has been posted to github next month -- see WeRelate:Call for code volunteers
(I know this has been mentioned in various places, but it wasn't listed here so I thought I'd add it.)
It would be wonderful if MediaWiki could be upgraded to the latest version. It's currently at 1.7.1, which was released on 2006-07-08.
This would make all sorts of things possible, such as API access and a million other things. :-)