There's currently a request on CoSource for a visual DocBook editor.

Anyone interested in end-user XML applications should check it out. I'd be
happy to see more requests, comments, commitments, proposals, etc.

http://www.cosource.com/cgi-bin/cos.pl/wish/info/296

"I need a document editor which saves XML/docbook documents. This can be
an extension of an existing editor (Lyx, AbiWord, etc) or a completely new
application.

"I want to replace all instances of Word97 with an XML editor which enforces
strict docbook tags. The target users are secretaries, not linux gurus.

"It has to be wysiwyg or at least wysiwym. The text must be rendered on the
fly. Most computer novices aren't comfortable editing documents in plain
text. It has to support at least docbook, but it would be more useful if
it can support multiple document type definitions."

...Steve
http://www.memes.net