The WikiWikiWeb <http://www.c2.com/cgi/wiki?WelcomeVisitors> offers a similar experience,
at least in the sense of free-form context-sensitive linking.
A problem with "auto-linking" in NaviPress/NaviServer was that we never had a decent
database of content for suggested links, but Alexa might well have been a solution.
I guess given a text, we'd like to retrieve/generate the semantics from:
a) the author's context,
b) the viewer's context (proxy, process, or human),
c) arbitrary third-party contexts, and possibly even
d) collaborative contexts.
Might as well add it to the list of reports available from the FoRK management consultancy:
"Intrapreneurialism via Bricoleurism: Postmodernistically Puncturing the Productivity Paradox"