Recently google lauched a new social networking site called google + and started the battle with facebook. After orkut went down google started it's new project and finally lauched it. Google + is very much similar to facebook only which proved that google wants to start a battle with facebook. There was like button in facebook so google lauched the +1 button globally which shows that google just wants a war with facebook and is ready to even win it.Till now google + is still in beta and people can only join it by some kind of invitation only from it's members. Although you can also join it by going to this site and apply for a invitation from google.About Google+
It is company's top secret social layer that converts all the search engine into a giant social network. The first thing users are introduced to is stream which is like a facebook news feed which allows users to share videos, photos, links and location with their friends.You can watch this video for a quick look of google+
http://www.youtube.com/watch?v=rVk0Nl3722I&feature=player_embedded