Jacob,
you said "That is made with Illy, using the ArtBlue plugin from here", I can't seem to find this "Illy" thing or whatever it is, may be a typo? I probably don't understand the ArtBlue manual either, I can't even find the word "clipping" in the document. If by any chance you used the clipping mask stuff yourself, may be you can explain a little please?
I'm not very familiar with AI, I generaly work with a 3DCad program called MOI but I would gladly pay the $99 to do exactly what we can see in the video on this clipping thing.
Thanks,