Wiki's are web pages that anyone can edit. They can be quite a handy resource.
For example,
http://www.disinfopedia.org is a wiki that tracks how corporate money influences public policy and public opinion (usually through the corporate media). It has a lot of information, and anyone can add information about lobbyists and think tanks like PNAC, the Heritage Foundation and so forth.
http://consumerium.org is a wiki on boycotts, moral purchasing, fair trade and so forth. They have not set rules for how companies will be listed and so forth, so for now lists of boycotts and the like are being listed at this wiki -
http://www.channel1.com/users/dkesh/consumerpediaThere was a good general one called Recyclopedia that was up for a little bit, but it is currently down.
http://www.wikipedia.org is one of the most popular Wikis. However, the person who runs it is sort-of right wing, and he has made many right-wing users administrators. People really have to fight to get a balanced page for John Kerry, or put information to the George W. Bush page that doesn't reflect well on him.
It's too bad I don't have a colocated server any more, or I would probably put up a "progressive" wiki. Disinfopedia, Consumerium and Consumerpedia are there though, although their scopes are limited. As the technology flourishes, I'm sure some will go up.