The NYTimes has come out with yet another visualization-driven approach to allow citizens to experience tough policy making first-hand. Obama's 2012 Budget Proposal: How $3.7 Trillion Is Spent [nytimes.com] presents an interactive treemap in which each rectangle is sized according to the proposed spending.
Clearly inspired by the good old classic SmartMoney Map of the Market, the green versus red color coding shows the severity of the proposed cut or increase from the year 2010. The graph is quite an amazing accomplishment in revealing the full detail of what is otherwise a complex budget proposal, but one in which you can still rather easily loose orientation.
See also Your Chance to Cut the U.S. Budget Deficit for another interesting policy visualization.