That was really, really inspiring.
I don't know (or care) what most people associate with "Genius", but I couldn't help that word from reverberating around my mind when I was reading about your setup.
I want to ask you so many things! Would you be open to an AMA (ask me anything) of some sort? A few things that I'm curious about:
General
* How do you click? Do you have tap-to-click turned on, or do you use press harder with your nose to trigger the magic trackpad's "click" threshold? If the latter, does your nose hurt after prolonger use?
* What kind of gestures do you have? What kind of gestures would you create, if you could create any gestures at all? Have you found third-party software to facilitate this? (I imagine the default software hasn't considered mouth gestures at all)
* Do you use this setup for your creative work alone, or for casual computer usage as well?
Performance & Accuracy
* You mention that you've gained the same level of accuracy as with your hands, and that's the most important factor (to me, at least). A secondary one, though, would be speed. Do you notice any considerable difference in your "input performance" when you use the nose/mouth setup vs. traditional input methods? How was your learning curve with respect to accuracy and then speed? (I'd expect you to have gained accuracy first and then built up performance over time)
* What's your pointer speed & acceleration like? I imagine both to be quite low, otherwise you'd have to perform very precise and minute movements in order to to high-precision stuff. For example, can you move your pointer from top-left corner of your screen to your bottom right with one movement? (I would think not). Is that the kind of thing that you'd complement with a mouse?
* Tangent on previous question: Are your "nosepad" settings (speed/accel) different than your trackpad/mouse settings? If not, is that a System limitation that you have accepted (optimizing for the nosepad, I'd imagine)?
Social
* Do you receive negative real-world reactions to your setup? Are people largely accepting & encouraging?
* What kind of feedback & reactions have you received online, after publishing this?
I'd like to emphasize again that I was blown away by your creativity. You exhibit the hacker spirit to the fullest. If you receive any hate because of this, I hope my enthusiasm counteracts that a bit :) I know that one negative comment can outweigh 1000 positive ones.
EDIT - more question(s)
* How has your posture evolved through time? I'd be surprised if you never had issues with your back/neck, but it seems that you've found the right posture that minimizes that strain.