Hi everyone,
About a week ago, we had the (first-ever) enterprise MediaWiki hackathon in New York City. That was something that had been discussed at least since SMWCon last year in Berlin - although back then the plan was to have it in Europe. Anyway, we had seven attendees altogether, and I thought it turned out well; and if you're curious, I just wrote a blog post about it:
http://wikiworks.com/blog/2014/02/20/post-hackathon-thoughts/
-Yaron