Good list of 3D technologies out there. What's interesting with OpenSim is the way that its beginning to divorce 3D graphics from the actual protocols, so you can use your 3D engine of choice - as RealXtend have done. Would it be possible to do the same thing with one of these web/flash based systems and put it in an OpenSim/SL wrapper? One feels the metaverse getting closer.
***Imported from old blog***