There are circles that people do share out. - Just blindly follow them for a while. It's more fun on G+ when you're amongst strangers and just looking around. Slowly and eventually you'll build your own personal list. - Then it gets interesting. :)
and they are forking Android... I won't be surprised if Samsung joins hand with Facebook. I love Open Source, but committing so much resources on Android with no proprietor rights is not the way forward.