What have citizen journalists contributed?

Keen dismisses citizen journalists as "a pajama army of mostly anonymous, self-referential writers who exist not to report news, but to spread gossip, sensationalize political scandal . . . " (p. 47). Let's find some examples of citizen journalists making real contributions. Are there any citizen journalists out there with formal training in journalism, but a different vocation? (Sites like www.groundreport.com and www.newassignment.net are good starts. In the interest of full disclosure: The administrator of this site has contributed to both.)