I did interviews with most of the TechCrunch50 experts backstage and there was a common gripe about the companies launching there: Not enough passion, not enough swinging for the fences, not enough trying to change the world... One big exception was CitySourced - a company that excited Kevin Rose precisely because it was trying to build something that doesn't really exist today and would make a huge difference in people's lives. It was the most excited I saw an expert about anything over the two-day event.