The good people at Ushahidi.com have announced an update to their open source information collection and visualization software platform.  Version 2.1, code named "Tunis" is now available for download from their website: http://download.ushahidi.com/

With this update they've added several significant new features such as report filtering and the ability to generate custom forms that augment information collection efforts.  Check out the announcement on their blog here: Announcing Ushahidi v2.1 (Tunis)