It seems like Google + has age requirements? I was just invited but apparently I am not old enough to join. How are they planning to beat facebook and such when most of the users in Social Networking Sites are teenagers?
I pretty sure I read somewhere that the (?18+) age requirements are only in place while the're testing it. I'm not sure what the age requirements will drop to when it comes out of beta, but will probably be on par with facebook. Cheers James