I get this feeling that the diffusion of new services and technologies such as blogs and social network services are not normal. Normal diffusion patterns are sort of bell curves that track mass media attention and other factors including effort on the supply side. With social network systems, there seem to be regional explosions of users. Orkut now has more Brazilians than Americans and I have yet to hear a good explanation of why. There are very uneven proportion of bloggers in different regions. The last I looked, Poland and Iran seem to have an unnaturally high number of blogs. Does the digital word of mouth nature of social software make it's diffusion faster (viral) and non-linear? Is the diffusion of other technologies in these markets and segments that are networked also change?
Is there anyone doing good work in this area? I'm sure marketers have their theories on this. I can imagine anthropologists and sociologists also studying this. What is the right way to study this?