There is a lot of *noise* on Twitter lately with Ashton Kutcher hitting the 1,000,000 follows. Some people like it, some do not - most don't care.
But when you have the rockstars on Twitter (Kutcher, Oprah , Ellen Degenerous , SnoopDog , John Mayer, etc) and the follower counts are in the six-seven figure ranges you get something else. Stellar demographics from the sociosphere!. As just an example in it's simplest form, let's assume that I am an agency that will be launching an upcoming Rap Star, and his newest single. I will easily be able to data mine the social networks for not only 'mentions' of like artists, and other profiling - but sociographics that also include information like who I follow. I know this is only one more new piece of information, but in it's entirety, we finally have enough to create intelligent algorithms.
As I have alluded to in an earlier post (Facebook - Google's real competition), Social Networks will soon start to realize their true inerrant value. If you look underneath the hood at Twitter and Facebook, there's "Gold in them thar hills!".