A social networking site with the rather lofty goal of saving the world, Just Cause (beta) aimed at connecting people to causes that create change. Set up a profile, create or join a cause, blog about it, plan an event, invite other people to participate in your cause. According to the site, a “cause” is similar to a user group or discussion group on other sites where like-minded people can communicate about a specific issue that is important to them. The site is currently in open beta. URL: Just Cause.