I have Photoshop CS6 extended, and it would be nice to be able to use FaceFilter Studio as a plugin.
As a side note, it would be cool if facial morphing like Morpheous was added as a feature. The face is already mapped by the software to apply pseudo facial muscle morphs. Being able to morph from one face to another, or even blending multiple faces would be cool in order to come up with totally original varients when rendering a specific person's likeness is not the goal.