How to achieve dust the most cost effective way possible?

Was suppose to be modeling and rigging a draft of the character.. but I keep getting caught up with how I'm going to shade the bunny. So, instead of spending time modeling and rigging something we won't use. I investigated more on the Dust Bunnies skin.

N particles are sending me in circles. I can't keep them inside the mesh. I did model a quick head and put n particles in. The particles literally shot out of the mouth where the walls of the mesh were the closest. I don't have a video of that, but I do have other videos to show my attempts.

I considered the idea of using fractal displacement maps as a simulation of the dust. This is just a test of me messing with it, but I don't really think it will give me the look I want. However, maybe I just need to play with it even more.

For this one, I continued with the idea of displacement, this time using noise. Again, this is strictly a test. The displacement maps are awesome, however they are very picky. One little pixel can throw off your map. Maybe I'll try creating my own texture and see what comes of it.

Show how my results are working with NParticles. I honestly don't know how to control them. I want them to form around every nook and cranny of my mesh.. and then not move.. but continue to.. move. Can I adjust it to where there is NO gravity and they are just floating, while obeying the movement of the mesh? Maybe a command that tells every NParticle  "Ok, this is your playground. Move around slightly, but don't pay attention to how fast the mesh is moving.. just keep up with the mesh.. while not moving.. but move slightly"

 Ok, lets try something new. Individually placed spheres, Basic Rig, Ramp Shaders, Photoshop, boom. We have a creepy open and close animation of a sphere. The camera is in front of the sphere, while the sphere is opening and closing its mouth like pacman. I definitely don't want THIS result for my dust bunny. But the process might be something to consider. It gives me a defined mesh to work with. I can then just make a blend shape of the spheres moving where I want them to move and have it loop while the animators animate.. but how do I create a facial structure out of this? .. back to the drawing board.

 .. I think I want to try using a misss shader on my individual spheres if I go that route. But I also want to read up more on nparticles.

 -darren