Social networks 'are new e-mail'

Social networks 'are new e-mail': "'We are all in the process of creating e-mail 2.0,' David Sacks, founder of business social network Yammer said.

Tens of millions of people are using social networks to stay in touch.

The growth in such services is being heralded as the start of the real-time, pervasive web.

'New communication'

Mr Sacks said: 'What people want to do on social network these days is post status updates. We think it's all people want to do.'"