Online Social Networks

Let's hear what Business Week has to say about Online Social Networks for businesses:
"Social networks aren't just for teens anymore. Executives and companies are increasingly using online social networks for a wide range of activities including recruiting, branding, advertising, sales, business development, market research and customer service. There are a number of social networks designed for executives, including LinkedIn, Ryze, OpenBC and Ecademy. Other firms are creating their own social networks to keep in contact with both company alumni and customers"

PS: My favorite is for sure linkedIn.
You can see my linked in profile:
linkedin.com/in/caesar

The way companies use social networks such as linkedin