Non-profit online social networking?

Since the success of non-profit web sites like Wikipedia, Wikispot and craigslist, the following questions need to be raised:

- Can there be a non-profit media web site that does social networking and email?
- Further, is there an alternative to most internet media being under the control of just a few large for-profit corporations?
- Is there an alternative for professionals who create media, such that revenues go directly to them? Can a non-profit service allow for the remuneration of professional work and be easy and intuitive to use and organize for consumers? (something like producer rewards on Metacafe, but not run by a for-profit company)?
- Is there a decentralized, more democratic alternative to academic journals, which could flatten the power currently held by editorial boards, but still allow for peer review such that authors could build reputations through excellence in research, while having true academic freedom? Could it gain respect in academia as Wikipedia has?

The idea could start with a nonprofit online social network. Costs related to compliance (legal issues with illegal content in posts etc.) could be mitigated by allowing local management of the nonprofit sites. In other words, the social networking sites would work like the WikiSpot project -- instead of one organization running hundreds of millions of pages, each local social network would manage its users' pages. Of course, like with WikiSpot, a standard would allow people to link their pages with friends in other local social networks.