Here is a story on it
Circles – The easiest way to share some things with college buddies, others with your parents and almost nothing with your boss
Sparks – A feed of only the things that you're really into, so when you're free, there's always something waiting to be watched, read or shared
Hangouts – Let friends know that you're free for a video hangout, any time, anywhere. Then catch up, watch YouTube or... just hangout
Instant Upload – Taking photos is fun. Sharing photos is fun. Getting photos off your phone is pretty much the opposite of fun. With Instant Upload, your photos and videos upload themselves automatically, to a private album on Google+. All you have to do is decide who to share them with.
Huddle – Texting is great, but not when you’re trying to get six different people to decide on a movie. Huddle turns all those different conversations into one simple group chat, so everyone gets on the same page all at once. Your thumbs will thank you
You can see a Google plus demo herehttp://www.google.com/intl/en/+/demo/
If you already have an invite and want to invite someone else, click on share, that is a box that drops down, add something in there, like "Here is an invite to Google Plus", under that you will see a blue link "+ Add circles or people to share with", when you click that enter their gmail address, email@example.com. Don't let your mouse go out of the drop down box, then click share, they should get an invite to join, here you just click on the button in that email.
I am loving there photo albums, you can share your albums with people in your rings, rings can be just yourself and another person or you can add more to a ring.
the Google+ project for mobile
Real-life sharing rethought for the web, wherever you are.http://www.google.com/mobile/+/
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