TinyMCE, the primary 3rd party editor which can be incorporated into Drupal, worked initially after a fashion. I found that it doesn't work well with the theme's css files (i.e., new entries in the theme's css need to be created to support editor operation).

I then found that TinyMCE disappeared after after adding some new features and configuring things for wiki operation. I've spent hours trying to figure out what the problem is.

For example, I'm making this entry without the TinyMCE editor controls at the top., but when I go to preview mode, the editor magically showed up?????

So this is another outstanding problem to resolve, since the editor controls are crucial to creating high quality blog and wiki entries.