To follow that up, I would create interactive 4D visualizations of important institutions like congress, and of course the corporate historians could use it to visualize their companies' histories, perhaps sparing us the hassle of filling out job application fields all the time.
I have a dynamic graph visualization library. For too long, we've been content with contact lists. I want to create a dynamic visualization, one that journalists can use to point to referenced people in a story. With a billion dollars, I wouldn't have to do all the development myself.