Google has now released a social graph API. This API will help social networking site to grow fast as this API will allow developers to write apps that can easily link up people on social networking sites. The API takes the publicly declared relationships about your accounts, on Twitter, MySpace.com, orkut etc., and then your friends and their accounts, and makes that information publicly accessible for new apps. So, when you join a new network built using the API, you won’t have rebuild your social-network contact list. To know more about this API, see the below video.

Technorati : Google