From literally just after the tragic earth quake that hit Haiti, the Ushahidi team hit the ground running; launching haiti.ushahidi.com an instance of ushahidi dedicated to tracking the crisis situation.
Since then, the activity on the instance has grown tremendously. The Ushahidi team has even set up a Situation Room at the Fletcher School to keep up with SMS reports and such. Right now not only are there status reports on the map, but with the new overlay feature of Mogadishu, the latest version of Ushahidi; you can visualize KML overlays of different kinds of data like where medical facilities are located. In addition there’s a stream of photos (which you can help tag) and an embed of the Google person finder ‘gadget’. Swift River, the crowd-sourced data filter, has also been put to use in tracking twitter activity around the crisis.
This is by and large the biggest deployment of Ushahidi not just in terms of traffic to the site, and number of incident reports but also it has been the most involving. It is taking the tireless efforts of a bunch of amazing people to keep this running.