Hi,
Here is something that's potentially of interest to everyone on this list: the (I think) first-ever enterprise MediaWiki hackathon, to be hold next month in New York City, Thursday-Friday, February 13-14:
I apologize for the late planning on this - and the fact that it coincides with Valentine's Day - but hopefully at least some people who want to get into enterprise MediaWiki development, or work on improving (and hopefully releasing) their existing MediaWiki extensions and software, can make it. If you're interested, please sign up on the page.