After several attempts to provide a WYSIWYG interface for MediaWiki, we at FCKeditor have decided starting a dedicated project for it, aiming to propose a definitive solution for it.
The main criticism again such kind of integration is that rich text editors produce HTML code, and MediaWiki runs with Wikitext. We prioritized this problem when developing this prototype and our FCKeditor integration now produces Wikitext, satisfying this need.
This extension enables a more intuitive WYSIWYG editor when editing pages on a MediaWiki-based site. It uses a special version of the FCKeditor WYSIWYG editor that outputs wiki text rather than the usual HTML that caused problems for MediaWiki integrations in the past.