This is the reason you should be using social media tools within your organization. Not because it's popular, but because it will improve your organization. Want to know how? Go watch the video.
Over the past few years a wide array of "Web 2.0" technologies and communities have appeared on the Internet; these include Facebook, Twitter, Wikipedia, YouTube, and del.icio.us. Organizations are in the early stages of incorporating these tools into their work, a phenomenon I call "Enterprise 2.0." - Andrew McAfee on Enterprise 2.0