Ben Hammersley on meme hubs: "If we can use the same theories to think about meme propagation as we can about viral epidemics, in that the propagation follows a scale-free network, I think we can add another level to it: transformational hubs. A node that transforms the medium in which the meme is propagating will immediately become a hub. If I write about a web-meme in a newspaper, it changes the medium, and the newspaper becomes a hub". More of a wormhole I think, because media aren't completely different but just very far apart. Think intercontinental airports and disease spread.