It is similar to Yahoo groups but it can also be used like a secure reddit. So you can create a network, like Hacker News, invite who it is you want to join you

It is similar to Yahoo groups but it can also be used like a secure reddit. So you can create a network, like Hacker News, invite who it is you want to join your network and then post (just like Hacker news) interesting articles that people in the network can then comment on. We also offer the users the ability to share files. So we hope we offer something different, and better, to Yahoo groups.