We recently developed a site for Penn Medicine for an innovation tournament called Your Big Idea. the purpose was to identify great ideas from their 20,000 employees and put them into action. We had expected a few hundred ideas to be submitted, but wound up with over 1,700 ideas. There were over 100,000 votes on the ideas cast.
I can't say enough how impressed I am with the team that ran the tournament. And how impressed I am with Drupal, for holding up perfectly.