Living Worlds - shared VRML worlds
This is a small collection of documents from the effort to create shared VRML2.0 worlds. As far as I know no implementation was completed , largely because there weren't any really compliant clients around. The servers existed and were quite up to the job.
I no longer work on this, so there is not much more information I can help you with
The work was a collaboration between Paragraph (later bought by SGI); Blaxxun; and Sony.