http://wikimania2011.wikimedia.org/wiki/Developer_Days#Topics
These are the topics so far for the developers' hackfest, August 2-3, in Haifa, Israel. Now's a great time for people to prepare sprints. A few developers and I should prepare the code review training, Mark should prepare bugs to smash, ops people who want us to fix IPv6 bugs should put them all in one place, and so on.
Additionally, a few Mozilla developers might come, so I've been asked: "Do you know about any particular Firefox issues that bug MediaWiki developers? Can you think about any Firefox extensions that might be beneficial for the movement?" Other than Firebug!