exploring the webs of citizen journalism

Barry Saunders (thanks Laurel) is doing some very interesting research into citizen journalism & issues on the web. His work interests me on two levels:

• Citizen journalism itself - which simultaneously has been around for a very long time and is also very new in its current visibility.
• The tools he is using to explore this. Issuecrawler and Leximancer look intriguing. Anyone else played with these already?