I have used SketchBookX which is awesome with the pen, MUCH better than with just a capacitive stylus. However I have not found a brush or setting that takes advantage of the pressure sensitivity of the Scribe pen.
Maybe there is a setting that does take advantage of pressure sensitivity, or maybe the full version?
Maybe one or more of the Adobe Touch products will be released for the Flyer/View AND have advanced pen functionality? (I can dream, can't I)