Causecast aims to take corporate social responsibility to a whole new level.

FORBES: Corporate Philanthropy: How Companies Can Give Back And Save Money

This use of social media has reached a whole new level with Facebook Graph Search.

FORBES: Facebook Graph Search Will Find You The Perfect Date

NextDoor is a new start-up that brings private social networks to the neighborhood level so that people can share relevant hyper-local information.

FORBES: NextDoor Brings Private Social Networks To Local Neighborhoods

Observers are divided as to the best way of expanding hydropower, with some urging the construction of major new dams on grounds of efficiency while others promote smaller, community-level installations for social and environmental reasons.

BBC: Woman pumps water from standpipe. Image

There's many other features to come with BB10 that will really level this BBM experience... which will upgrade that experience to a whole new social networking experience based on BBM... we want to use this to build a BlackBerry-driven social networking platform.

ENGADGET: RIM CEO hints at future BBM video chat feature Mobile