Richard Weait does a LocationTech tech talk providing an introduction to OpenStreetMap:
This video is a demo and introduction to the work MapBox is planning for OpenStreetMap.
Dave Jenne talks about Trail Hazards and how to warn OSM users of dangers ahead in his Lightning talk at State of the Map in Denver, 2011.
Jim McAndrew talks about GeoBus, the vehicle for OpenStreetMap Community Building during the Lightning Talks at State of the Map in Denver, 2011.