With Facebook's recent stumbles in online privacy, a lot of people are now calling for distribtued information sharing systems, which people can use to interoperate between different servers, different providers, or run your own if you so choose. The Diaspora project has been started by a bunch of grad students to do exactly that, and it looks like they've gone viral.  At the time of writing, they had raised over $160,000, when all they were looking for is $10,000.