Yes. There&#x27;s Diaspora and Frendica already, with maybe a few hundred users.<p>To launch something like this, you need to figure out some way to get a user base, a user base that people will want to connect with. Something like<p>- Ivy League students (hey, it worked for Facebook.)<p>- VC, angels, investors, and startup CEOs. (They might like something with more security, especially since they might be planning to take a bite out of Facebook or Google.)<p>- Political groups, where there are communities of fund-raisers and lobbyists, people trying to get things done together and concerned with others not listening in.<p>Consider targeting groups that involve people working together to do something.  They need to-do lists, spreadsheets, scheduling tools, and other collaboration support. Basically Box.net&#x27;s feature set, but without Box, Inc.