More data at their web page, here.
Here is a descriptive quote from their web page:
The San Francisco camp, held May 7 after the Web 2.0 Expo, aims to examine privacy and social networks.
Barcamps are user generated conferences. The agenda is typically decided in the first few hours by the participants. If you have a session you would like to moderate, propose it, and if there is enough interest it will happen. You don't need to be an expert to moderate a session, just willing to stand up in front of a small group and manage the process.
Privacy camp is a three part event this year. The San Francisco event is part 2. The first part already happened on April 17 in Washington D.C., with a focus on the government policy and privacy. Part three is scheduled for Toronto, in June (exact date not yet decided).
Barcamps are a great way to learn and network.