Blogs - social networking applications and community software solutions - are moving from the social realm to the corporate world. But companies aren't replicating the free-flowing exchange that has been a hallmark of the broader blogosphere.
Keep in mind that this idea, "first principal of social web apps", applies mostly to external social web applications and not so much to internal ones. Internal social networking applications and community software are driven by business development requirements, which are generally more rigid than those found on the open net.