Alternative to FCKeditor / Rich Text Editor...

I am looking at an alternative for the FCKeditor / Rich Text Editor in an app that I am working on and ran across a really cool XHTML editor called Wymeditor, you can kind of get an idea as to what it looks like here: http://www.cottonrohrscheib.com/projects/p.../03-plugin.html. Does anyone have any experience working with or integrating this inside of phpr? If not, any suggestions as to where I might start looking to integrate it?
I haven't spent a lot of time messing with this yet but plan on doing so the next few days, if I run across a method for doing this I will post it back here. This editor is pretty slick in terms of what it will allow your "end users" to do. Here is some more info on the editor: http://www.wymeditor.org/en/