Essentially, it is a rewards system that makes what we already do on the web – create and share content – fun by making it a stock market-like atmosphere. You can earn money (their currency is “Eaves”) by buying other people and you can see your own worth rise by getting other people to invest in you. When tied to other accounts such as Twitter, Facebook, Flickr, YouTube, LinkedIn and blogs, your net worth rises based on the content you either create or share. But like the other sites, it’s also a social network itself. It’s a chance to connect and brainstorm with others by finding affinity groups (“Communities”) within Empire Avenue.
via The Social Media Marketing Blog: The Gamification of Social Media.