Hey, nice work.
I mucked about with the idea of a half-dwarf too but called them stoutkins (having previously binned the term stoutling as it sounded too cute for dwarven stock).
I also toyed with the idea of a stoutkin-specific feat called Awesome Beard which was a stackable feat that gave a +1 to Bluff, Diplomacy, Disguise (as long as the subterfuge involved imitating somebody bearded) and Intimidate when used on dwarves as they were so impressed with your beard and that it was obvious you were of dwarven blood. Obviously you had to have a beard and be male.