News: I will shortly release another spell checker hack, based on
PungoSpell which will support standard and WYSIWYG modes, and displays WYSIWYG in the popup windows without the tags.
One draw back to PungoSpell, is that it will require you to have PSPELL compiled into PHP. Some have this by default, but some don't. Another draw back is the lack of the "learn" button.
I initially worked on it and had it tested, but decided to use PHPSpell for the added features. . But since I modified it already, I'll just clean it and release it, so those who prefer full WYSIWYG display can use it.
Stay tuned.