Facebook co-founder and CEO Mark Zuckerberg today announced the launch of video calling, powered by Skype.
He announced during facebook something awesome event at facebook headquarters in california.The company also revealed other chat improvements, including an option to see the friends you message most and group chat, and confirmed that it now has 750 million users.

How it works;

The video functionality has been built it right into Facebook Chat, so all your conversations start from the same place. To call your friend, just click the video call button at the top of your chat window.
Facebook is making this new feature available in over 70 different languages. Video calling will be available to everyone over the next few weeks, but if you don’t want to wait, you can get it now by going to facebook.com/videocalling.

In addition, the new chat design includes a sidebar that lists the people you message most. It adjusts with the size of your browser window, and automatically appears when the window is wide enough. As for multi-person chat, which Facebook says is one of our most requested features, all you have to do is click Add Friends to Chat. Just like your other chats, the history of your conversation is available in Messages.

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