Will Web 2.0 CHANGE the world?

In Roger's introduction, s/he discusses the process of change and the diffusion of innovations based on a number of variables. One that struck me in particular was the rate of adoption and its relation to social structure - the notion that the norms presented within the social system promote or inhibit the adoption of an innovation. I started instantly thinking of social structure as community and the community's influence over its members and vice versa. What I'm wondering is as we become a more socially connected society through Web 2.0, what will the implications be on the rate of adoption of an innovation? Rogers discusses the S-curve graph. Will rate of adoption increase so rapidly because of our ability to communicate information with greater velocity that the graph looks more like another letter? A straighter diagonal line perhaps? What do you envision the impact of Web 2.0 on change to be?