White House 2 was an experiment imagining how the White House could work if it was run democratically by thousands of people over the internet.
It ran from November 2nd 2008 until December 8th 2010.
Here's the full text of the presentation, Imagining White House 2.0, I made to the Personal Democracy Forum conference in New York in June of 2009 about what I learned.
The code is all open-sourced on github, although it is no longer maintained.
Some of the concepts I experimented here have made their way into NationBuilder, which you may be interested in.