This report is worth checking out. It's a rare piece that explores what it takes to create change leadership within the government, and Dan does an amazing job of describing and categorizing the types of change leaders, so much so that I learned a good deal about my relationship with Art Cebrowski by reading it.

The paper reminds me of Gladwell's categorization of connecting types in Tipping Point, but again, pursuing a venue (the government) that's very rarely explored with this sort of approach, so truly path-breaking.