After Erik's email about supporting open source machine translation [1], I've been researching options and having talks with several machine translation researchers about what would be the best way to integrate MT into Wikipedia. Unfortunately I couldn't find a single solution that, on its own, would fulfill all requirements (specially being open source). On the plus side, there is a set of technologies that if integrated, they could provide a positive and reliable experience. It would be a hard way to get there, and even so, it might be worth exploring.
This is the preliminary draft: https://meta.wikimedia.org/wiki/Collaborative_Machine_Translation_for_Wikipe...
It is a shame that the talk about "Supporting translation of Wikipedia content" [2] has not been accepted for WM13. Hopefully there will be enough interest to discuss this topic there anyways.
Micru
[1] http://thread.gmane.org/gmane.org.wikimedia.foundation/65605 [2] https://wikimania2013.wikimedia.org/wiki/Submissions/Supporting_translation_...