In reply to ByEek:
> GMail is the messaging agent for Google Plus, your contacts are now effectively you friend list and can be combined into circles and all manner of other every day stuff you might also use, is also part of Google+. It is very clever how they have basically created a social network that contains millions of users who don't even know they are part of it
A social network most of whose 'members' don't actually participate isn't really much of a social network, though, is it?