DO-ROAM - Activity-Oriented Search and Navigation with OpenStreetMap (http://do-roam.org)
DO-ROAM is based on the Rails port (the Ruby on Rails application that powers http://www.openstreetmap.org). See http://wiki.openstreetmap.org/wiki/The_Rails_Port on how to setup and run the rails port.
More info on how to setup DO-ROAM coming here soon.