This report focuses on the public participation and collaboration elements of the president’s Open Government Initiative. It details the activities and programs underway in the 29 major agencies and provides case studies of the current and planned participation activities of four agencies: the Department of Transportation, the Environmental Protection Agency, the Department of Health and Human Services, and the National Aeronautics and Space Administration. The authors found that agency plans offer a great deal of promise in terms of the range of activities and commitments underway and planned, especially in the use of electronic tools and techniques. The authors also found that there is much room for improvement in several areas. The report presents a series of recommendations to agencies on how they can achieve enhanced public participation and collaboration