Another bit if Google Social Media Circle is out today, the Plus 1 / +1 recommendation button in search.
Basically, when you search now you may see a little +1 button next to the result. If you like the result, you hit the button to share with friends.
I assume that it is shared to your Google Profile page.
SEOs are already talking about how bots and people with multiple Google accounts will try to use it to game the engines.
Learn more here: http://www.google.com/+1/button/
“The +1 button is shorthand for “this is pretty cool” or “you should check this out.”
Click +1 to publicly give something your stamp of approval. Your +1’s can help friends, contacts, and others on the web find the best stuff when they search.” Google.com