Here’s an example from today’s NYT of biopower in action: “Facebook to Turn Users Into Endorsers”

Facebook was just bought by Microsoft. Now they are turning their website into a tool for users to internalize corporation’s brands into their personal identities. This is a good example of why Hardt & Negri see “the primary site of struggle on the terrain of the production and regulation of subjectivity” (Empire 321). Facebook users now have the option of choosing to join an “i love Escalades” group or a “protest the RNC” group. Which group gets more members may be determined by which group owner has more capital to buy advertizing space. Thanks to Microsoft for decreasing the democratic character of facebook. A good critical article on how consumers are becoming biopolitical producers of brands is:
Adam Arvidsson’s “Brands: A critical perspective” (2005) -

Abstract. This article proposes a critical perspectives on brands based on recent developments within Marxist thought. It argues that brands build on the immaterial labour of consumers: their ability to create an ethical surplus (a social bond, a shared experience, a common identity) through productive communication. This labour is generally free in the sense that it is both un-paid and more or less autonomous. Contemporary brand management consists in a series of techniques by means of which such free labor is managed so that it comes to produce desirable and valuable outcomes. By thus making productive communication unfold on the plateau of brands, the enhanced ability of the contemporary multitude to produce a common social world is exploited as a source of surplus value.

(also, see his book - _Brands: Meaning and Value in Media Culture_ (2006))