Debategraph

Question: What is a an argument map with aspects of a wiki, a forum, a blog, instant messaging and social bookmarking?
Answer: Debategraph
Debategraph gives a visual representation of the intricate arguments and issues in a debate and participants can input their views to it.
http://debategraph.org
See a detailed description of an example:
http://news.bbc.co.uk/2/hi/technology/7827112.stm