Why Use Google+: It's What You Know, Not Who You Know
huffingtonpost.com
huffingtonpost.com
Personally g+ became a great replacement for twitter/facebook interaction about thing I care about. I like sharing ideas - and g+ seems to be perfect platform for that - be it politics, music, photography or computer science. It's by far the best community related network out there (or at least with potential to get there fast) in my opinion.
So yeah it's kind of a pity there is only a fraction of my fb "friends" there, but you know what, i don't miss facebook - i'm not using it, same with twitter. G+ is just something else, and it might stay this way. But I would be the last to complain to be honest.