I hope you dont forget Mike Gravel.

Official Google Blog: Presidential campaign trail winds through the Googleplex

Interesting to see some big names but lets not forget Mike Gravel, who is possibly the most straight talking, honest and down to earth human, making others look like mutants. Anyways, the main reason I'm bringing up Gravel is that he is where he is now thanks to youtube and google. If you look at number of search queries for Mike Gravel after the last debate, you'd find that it outnumbered all others combined.
Google is enabling democracy in ways never possible before and it should not only own it but encourage it by highlighting it as a case success story.
Anyways, Google, just invite him - you'd probably have to fork out a bus ticket, which I'm sure you can afford.