For adhoc, and those who like information in general because even though it is about the US budget and government, it is interesting and looks cool.
picture of poster of where the tax money in the USA is spent - click on pic makes it larger, at least in my browser. You can also buy this poster, I believe.http://www.wallstats.com/blog/wp-conten ... Tlarge.jpg
by the same person/people, visualising one billion (US) dollarshttp://www.wallstats.com/blog/visualizi ... n-dollars/
The blog these are on, which says about itself "...interesting posts concerning goverment, taxes, and information design"http://www.wallstats.com/blog/