I was invited to the private beta of Erepublik recently which is more than another social site. Its a social world. With political parties (you can create your own), companies, armies the list goes on.
Just like in real life, I notice there isn't an instruction manual, so I suppose we will just have to make it up as we go along.
I'm still quite a newbie on the site but I do have four invites for anyone interested. If you are leave your name and a valid email address in the comments.