Google recently added the "Office of Management and Budget" to its Public Data Explorer.
"The OMB's mission is to help the President of the United States prepare the budget and oversee its application to federal agencies. As a result, it's also the central clearinghouse for U.S. budget data -- statistics that are now available for the first time in Public Data Explorer," explains Google.
So what does the data show? Check it out and you'll find a number of interesting things. For e.g., have you ever been curious how the US Budget gets funded? The chart below shows the distribution in 2009:
View more charts here.