The final version of our paper on the interactions of avatars' visual aspect and social aggregation is now available and referenced (see earlier posts). The first published paper of a series on interactions between the avatars themselve and the structuring of virtual communities. Following very soon, the paper on the impact of trade role-play in the Second Life Gorean community (which has been accepted already a long time ago, but somehow the final publication seems to be longer than it should be ...). And following a bit later, something we just submitted on an extreme case of social aggregation of avatars with particular visual aspect.
Lortie CL, Guitton MJ (2011) Social organization in virtual settings depends on proximity to human visual aspect. Computers in Human Behavior, 27:1258-1261.