links to knowledge sharing or knowledge management site; larger site is most comprehensive listing of web2.0 sites I have seen, organized into many categories; blogger is from Netherlands
huge portal site, across disciplines; "...other terms are sometimes used in place of place, such as home, dwelling, milieu, territory, and of course, space. None of these, though, are necessarily equivalent to the notion of place."
social bookmarking portal lets users share expertise on some subject; room for author's comments and explanations; more discursive than delicious; less writing than a blog; see "Visual Thinking," also "Ephemeral Films"
The invisible web, or deep web, is estimated to be 500 times bigger than the searchable web and comprises databases and results of specialty search engines that the popular search engines can't index.