If we get a good number of these, we'll set them up serverside on pixelation.
EDIT: Evil, you process is pretty solid. These are my comments:
Don't dither until you have all the shades you'll be using in there, otherwise you'll end up replacing the dither again later.
Start with more anatomically and volumetrically investigated designs. You can pixel well, time to step it up subject-matter-wise, I think.
Try shading different textures, more porous, hairs, less shiny luminescent highlight, as it seems you've done that a lot.
Good usage of Pro Motion for the most part. Similar to mine, so I can't rightly critique
Not a lot of indecisiveness, mouse always moving, not a lot of errors or backtracking.
Use the preview window instead of zooming in and out all the time, why not?