text2.0 with eye tracking and emotiv support may be a great tool to
annotate mediawiki content. It can provide valuable feedback to the
authors of articles from the reader.
If there are positions in the article many readers stuck, the author
gets feedback to explain those things in more easy terms. On the same
time, the article might hide less relevant complex information. Also
the suggestion to creating links on terms users tend to not know about
can be helpful for the author.
The definition of unknown words can get imported from the proper
articles using a popup interface as the instaview[1] script does.
The author might provide special tags like <important> and <optional>
to annotate what is needed to understand the topic and what is only
for deepening the understanding. A colored highlighting in editing
mode can give hints where the readers stuck.
[1]
http://en.wikipedia.org/w/index.php?title=User:Pilaf/instaview.js