Commonwealth Islands in Second Life (ning) a community site for group members and residents 

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Facebook: Greenpeace UK

Brooklyn is Watching: Amy Freelunch interviews Libertad Lane about the National Coalition Against Censorship

Greenpeace's Second Life: Is the Media Giant Missing the Virtual Boat?  Alan Innis (Rycroft in rl) explores the presence of Greenpeace UK and their efforts to use virtual worlds to build support and achieve their goals.