@beanz, I beg to differ somewhat. It is a social network, but we are not being farmed for marketing information. There is many companies that use social networking tools, at the last place I was working, until 2 weeks ago, we used skype, and our support ticket management system had an inbuilt messaging system for tracking internal information relating to tasks.
The only substantive difference between a social network (eg, facebook, twitter) and this and other work-oriented communication systems, is the former the 'customer' is the product, where as in here, we are the producers and workers as well as sometimes consumers.