Gary Hayes has an interesting post called “Virtual worlds rescue TV? or v.v.?” with an interesting analysis of how traditional TV and film media has been used in virtual worlds, and some discussion of the benefits in each direction. There’s some nice mentions of Twinity and The Spirit in there:

Twinity (by Metaversum, the German created virtual world) are a long ways from a mature stable platform, hence being in beta for the past 12 months or so, but are already exhibiting the best ‘world-led’ event-based, user activation. This in my mind is high on the list of reasons for likely success

Give it a read!