Ideal point estimates based on the Survey on the Future of Government Service were recently presented in Joshua Clinton, Anthony Bertelli, Christian Grose, David Lewis, and David Nixon. 2012. Separated Powers in the United States: The Ideology of Agencies, Presidents, and Congress. American Journal of Political Science 56(2): 341-54. Agency-level estimates are available in MS Excel format by clicking here. A codebook for the dataset is available here. Dave Nixon has produced a webpage for the survey here.