Social networking fosters collective intelligence, collaborative work and support communities. Tools and behaviors from the consumer world are now making the transition to the corporate world, with diverse implications for changing the way businesses operate. This paper explores 10 opportunities presented by social networking, along with 10 associated challenges.

http://www.business.att.com/enterprise/exchange_resource/Topic/technology-trends/Whitepaper/the_business_impacts_of_social_networking/