This site looks great so far and I have only been on half hour or so, it is currently in a test mode where only invited people can get on and I only went and got myself a bloody invite!
Eh people say it is just like facebook, bahaha bore me later FB is lame, you have a billion friends you never speak to and the privacy settings over their are easily beaten.
Google + will focus more on select groups and circles for you to allocate people in, you will be able to share things, chat and even video chat within your circles, it is all looking very posh and confusing at the moment.
If you need an invite to Google+ inbox me your addy or comment if you like.
Yes "Invite" feature is down but the way I get you in is not via that. You simply click to view the comment I share(via email) then click the "learn more" button, jobs a gooden!