Salesforce hosts the Dojo Toolkit but unfortunately there is a lack of definitive documentation on employing it in Scontrols. I wanted to create an scontrol that uses the Dojo Editior (http://dojotoolkit.org/book/dojo-book-0-9/part-2-dijit/advanced-editing-and-display/editor-rich-text) to give the user WYSIWYG controls for a text area.
Thanks to some assistance from fellows on the forums at developer.force.com I was able to put together a working prototype. Here is the working code;
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
<textarea name="field" width="200px"
It was a dark and stormy night. Your story belongs here!
<input type="submit" value="Save" />