Very very cool!
The Apple dictation in Mountain Lion works in the XPages CKeditor.
This is great news it makes things a lot faster for me on my current project.
I have been doing a lot of rich text editing from the web and the dictation makes this a lot easier.
I am still getting the hang of it though and I'm trying different combinations of words. It seems to work okay with my speech which makes me feel good since I'm a speaker.