Dear Fred,
Nice essay. Two ideas I appreciate in particular,
1. The gravitational idea: neutral half-holes in the quantum vacuum would have an attraction many orders of magnitude smaller than the "forces," and this attraction would be present for all "particles" because the elementary fermions would all be points of low pressure.
2. The geometric mass generating scheme.
I have no idea if these ideas are right, but they're certainly original and things I wouldn't have thought of myself! Good luck in the contest, and take care,
Ben Dribus