Has anyone made this using a Vitamix? Do you think it would work or too much power?

Not with the Vitamix. The KA hand mixer did the job quickly.

Since you asked the question 2 months ago, have you tried it yet? Results?

It comes together really quickly and isn't difficult - quicker than whipped cream for example. But the transformation happens quite suddenly.

I would be less concerned about having too much power and more concerned about the fact that his recipe calls for chilling the mixture as it's mixed.

Here's a totally different take on chocolate mousse that's made with a Vitamix: http://joyofblending.com/chocolate-almond-mousse-simple-fast-vegan/

Yes, I do. I didnt think it would work. Thank you very much.

I don't think so. It looks like it needs to be blended to incorporate air into the mix. Something that vitamix doesn't really do. Do you have a stick blender with a aerator disk?
Or put in the stick blender in tall bar glass and lift to incorporate air.