I made this budget simulator in response to Governor Corbett's proposed cuts to Penn State's state appropriation in his budget proposal. I borrowed the concept from a similar
New York Times interactive. The interactive itself didn't take too long to put together - it uses a small Flash piece for the animated diagram up top, and the rest of it is all Javascript. The submission calls an ASP handler which inputs it into the database, and it returns a URL which you can use to share your solution with other readers.
Almost half of the development time for this interactive went into researching and calculating all of the appropriate figures. I documented my sources and methodology for these figures in a subsequent
blog post.