@Jen
Sounds really good, especially from a grassroots perspective. Short of using something such as Ning, I am not sure how people will be empowered to doing anything on their own in this way. Perhaps that is what is needed; an open social networking application framework such as Ning?

@Mathieu
True; yet I cannot figure out how to use the same application with different public faces. How can this easily be distinguished? I follow you on some of the networks, for example, and I cannot really envision how your different faces may be shown–such as by levels that can be switched on or off? Perhaps this might be interesting to integrate into the Ning-like idea I mentioned above?