ohmynews is maybe the most successful citizen journalism site on the planet, bringing a high level of professionalism to citizen journalism. I'm at their conference now, and seeing a lot of people from all over the world.
These folks are committed passionately to reporting the news from the grassroots, bearing witness in ways that more conventional news doesn't, and speaking truth to power.
Also, they often risk more than their reputations; one of the problems discussed here is how to keep citizen journalists out of jail, or worse.
Me, I'm trying to help, maybe my best role is to bear witness on behalf of the people doing the real work.