Back in April, four NYU students decided to raise money to spend the summer hacking on their project: a privacy-friendly open source social network. They put up a page on Kickstarter, a crowdsourced funding site. Talk about being in the right place at the right time: after a great article Four nerds and a cry to arms against Facebook came out in the New York Times, in a few weeks Diaspora* had raised $200,000.
At which point they moved to San Francisco, got free office space, spent the summer hacking, went to Burning Man … and on September 15, released their software to the community. Basic functionality is in place: status updates, photos, “aspects” to control who sees what. Kudos to them.