I guess the literal definition of "post-processing" is anything you do to the fractal outside the fractal program. With UF3, it's becoming possible to do more and more inside the program, such as using one of the small utilities that allows you to turn a photo in a coloring algorithm, so that you can turn photos into fractals:

http://www.fractalus.com/cheshirecat/statue/statuetuesday.htm

Why don't the purists find that offensive? Surely such work dilutes the purity of fractal art, and the fractal community should protest!!!
I guess what we really need is for UF4 to allow plugins, so that Blade Pro and other filters can actually be applied within the generator. That way, an artist could use several Blade Pro presets and still proudly proclaim that the image is not post-processed.