I enjoyed this presentation by Francesco Dorazio of Makers of Universes.  Originally delievered at MetaMeets 09 in Amsterdam, Everything You Know About Virtual Worlds Is WRONG looks at some of the predictions made about virtual worlds and how they’ve actually transpired in reality.

Dorazio also talks about virtual world interoperability (38-9) and introduces the concept of outeroperability (52-3): a gateway service or ‘hub’ that enables visibility of avatars across worlds without supporting portability between worlds which seems to be a version of existing or forthcoming services such as Xfire or RealID (and surely the latter is sinister enough to be going on with).

Thanks to Don Brutzman on the X3D-Public list for highlighting this.