Intrigued by Circcles #edtech

I'm always on the lookout for new social networks and Circcle really has me intrigued.  It doesn't look like the network is too large yet and I haven't had much time to explore.  But Circcle appears to be social networking based on topic rather than individuals.  At Circcle you can search by topic to find and build a network that interests you.  The only disappointing thing is there doesn't seem to be a lot of documentation about how the site is supposed to work.  But Circcle definitely has me intrigued and willing to explore more.