Cheers to dmerrill. I came across his announcement of the Linux Documentation Project's Lampadas Project.

Lampadas will provide a web interface for authors to easily write documentation and for LDP staff to easily manage the document collection. Lampadas will be a very powerful publication system, and more powerful than any currently available in the Free Software/Open Source world. It will offer features oriented toward authors as well as the reader, such as document annotation.

Development version at: http://www.lampadas.org

A really handy piece of it is a Perl module + script for converting plain text/WikiText to DocBook, called wt2db:

http://cvsview.linuxdoc.org/index.cgi/LDP/wt2db/

There's an LDP how-to about how to author in WikiText.

You can check out wt2db from the LDP cvs and run it locally.

1. Log into their anonymous cvs:
   
    cvs -d :pserver:cvs@anoncvs.linuxdoc.org:/cvsroot login

 2. Grab the wt2db module:
 
    cvs -d :pserver:cvs@anoncvs.linuxdoc.org:/cvsroot\
      co LDP/wt2db/

 3. It also requires the HTML::Entities perl module, so do:

     perl -MCPAN -e shell

 4. At the cpan> prompt, type:
   
    install HTML::Entities

 5. Once that's done, you should be able to run the Makefile 
   in the wt2db distribution
  
    ./Makefile.PL

Nice.