Doors and entrances are called portals. The term portal has also been used to define a web page starting point. ProEd Portal is a starting point for my exploration of and reflections on women's issues related to education technology, higher education, and leadership.
Found this fun little tutorial about wikis on the USDLA 's What's New . Uses simple drawings, voice, and a "hand" to explain what wikis are and how to use them, by Lee LeFever,Common Craft.