In a previous dataset, we provided all of the Open Gov Plans:
This data was compiled mostly by Angela Newell, a Doctoral Candidate and University of Texas Continuing Fellow in the LBJ School of Public Affairs. For more information and conversations about Open Government, please go to http://www.govloop.com
List of key government social networking platforms
Here is the list of 2010 Government Federal Holidays
This dataset is hosted by another domain.