There was an event called Metaverse ’08 a few days ago. There was apparently an interesting session where an overview of virtual worlds was presented. You can find two write-ups about it from the Otherland Group and from Mr Topf. Twinity was mentioned as one of the mirror worlds in the 20-30 year old demographic. I always think it’s interesting when people try to classify our demographic for us, because I don’t believe there is one. As with all virtual worlds, there may be different appeal for different use cases among many different age and social groups.