I've been using Google Trends to track the rise of Facebook and the fall of MySpace for years. To my surprise Facebook has kept ascending up the Google search traffic for years past when I thought it would hit diminishing marginal returns of mind-share (I assumed it would level off in 2008). But it looks like it has finally reached a "mature" phase in 2011. First, let's compare Facebook, Myspace, and Google in 2008. The following is search traffic on Google for the whole world....