#MediaWiki needs to evolve. It needs to become more usable, social and global. The good news for the Wikimedia Foundation is that it is not the only user of MediaWiki. Wikia has also invested deeply in extending MediaWiki and giving its MediaWiki wikis a much more modern experience.
It is wonderful news that four Wikia developers received SVN commit rights. By involving Wikia developers in the development process, Wikia will have less work to integrate all the bits and bobs in the future while WMF will benefit from the knowledge and code that already scales for Wikia.
It is a win-win situation and I hope we will learn more as this story develops.