from my findings, the following sites offer a good opportunity for authoring:
I enjoy using the Wieducator site for my authoring because using Wikitext gives me a lot of flexibility as i am accustomed to HTML.
The availability of the Rich text option also makes Wiki authoring as simple as just preparing a word processing document.
One big advantage of using Wikis is that is allows for collaboration with other members of the network. another advantage is the fact that you can use the revision tab to monitor changes made to pages i.e. accept them to revert back to previous versions at any time.