http://www.mediawiki.org/wiki/NOLA_Hackathon
MediaWiki developers are going to meet in New Orleans, Louisiana, USA, October 14-16, 2011. Ryan Lane is putting this together and I'm helping a bit. If you're intending to come, please add your name here, just so we can start getting an idea of how many people are coming:
http://www.mediawiki.org/wiki/NOLA_Hackathon#Attendees
I'll add more details to the wiki page next week.