I realized I did not post my FOSDEM slides online; this blog post is to fix that ;-) So if you want to learn more about our approach to the on-line help, please have a look here:
It talks briefly about what we have done to bring the LibreOffice help online, and about the future steps. Talking of the future steps, in 3.4, the .xhp files are still the source of the help (check the presentation if you want to know what are the .xhp files), because we did not manage to do the 2nd step - converting the wiki markup back to the native help files.
Actually - I would like to mentor a GSoC task for that:
If you are a student interested in Free Software, with free summer, and Python or Perl knowledge (to bind to existing MediaWiki markup parsers), this might be a nice task for you!