In strategic management literature, the human capital implicated in a firm's employees has already for a couple of decades been considered as an important strategic resource (or asset) for a firm. Obviously, in "knowledge economy", the value of this particular type of knowledge has become increasingly important, especially in knowledge-intensive and creative industries (such as financial services, IT, or biotechnology)
In November last year, I criticized the logic with which some people calculated the valuation of Facebook corporation to be 15 billion dollars (see an original article as well as a further comment and a related article). I suggested that perhaps the fundamental value of this corporation could more realistically lie between 3-5 billion. Now, an interesting new piece of analysis arrived today: Valleywag news site calculated Facebook's current value to be 2-3 billion.