Interested in hearing your feedback about my framework.  It adds free-form
wiki and tree features (and many others) to emacs.  Just did a couple
screencasts:

  http://xiki.org/screencasts/wiki_syntax.html
  http://xiki.org/screencasts/web_development.html

Much of it was originally elisp but is now ruby via el4r (I'm a much better
ruby programmer than elisp programmer).

--Craig