For those who are pissed-off at Facebook...

[jducoeur]

... there is an interesting list of open alternative social networks from GNU. It's not all the social networks, mind -- it's seen through GNU's distinctive filter, and I don't entirely understand how they're deciding what's in and what's out -- but there are lots of interesting possibilities listed there that are flying under the radar. (For example, Crabgrass, a free-software social network specifically designed for organizing social movements.)