a self-institution for independent research, collaboration and learning
As a matter of drifting from the previous post a site most recommendable is University of Openness, one of the first art sites (that I know of) to have used a wiki effectively to make self organized projects. Especially the Cartography section offers a wealth of information and check the urban climbing section run by Lottie Child.
Gardending Superfund Sites is an art project that fosters discourse around the issues of nature preservation, industry, and activism. Information and workshops with students and community groups to create a call to action to high tech industries to take responsibility for their actions.