I’m beginning to think of the set of interfaces through which we engage meaning and interact with the wider social world as a mediating stack, with distinct many-to-one, one-to-one and one-to-many layers. The precise composition of this stack is going to be different for each of us, varying widely by where we live, how much time, money and effort we can afford to spend on its composition and maintenance, and (especially) when we came of age. So where my grandmother used radio, TV, newspapers, phone calls and written letters to bind her world together, I tend to use the Web, email and IM. And – here the technology really does tell – where she didn’t have access to a one-to-many channel at all, I have WordPress, Twitter, and (in edge cases) a variety of burst-email and -SMS options available to me.