Aye. I've used both Vim and Emacs (Emacs less so, but it was my main editor for a few months, so I feel comfortable if not proficient with it), and once I realized neither was what I wanted, I switched to Viper mode.
But, somehow, I never really adjusted to it and now switch between Vim and when necessary Xcode.
In the context of org-mode, that's actually quite useful. Did anyone ever hack some kind of canvas for emacs? Would probably work either by hackishly including changed images in the buffer or by embedding another X window.
BTW, I installed it and it runs with Aquamacs or the latest GNU emacs distribution, but not for the command line emacs that ships with OS X. Fun stuff.