I whish to give you some suggestions about your control:
1. The control is slow, due to the nature of HTML/JS, so I think there could be some improvements if you use Flash in some way. For instance, we could move the toolbars, options popups and context menus into a flash component. That would make things much more faster and easy.
2. I'm a mono developer, and one of big problems under linux is the lack of a asp.net editor, I think that FCK could be expanded to support asp.net development, and add some signals to external apps. That way FCK could become a multi-platform ASP.NET editor.
Tell me what you think of this
Some improvements & questions