As far as I know This-is-ant is special interest group which represents manufacturers of ant devices. Thus you are a representative of manufacturers, and those threads only mention that only device manufacturers can create drivers. This-is-ant is representative of several manufacturers, and I think that microsoft should be interested in that. For example, I am not buying a windows phone unless it has ant+ support. If they keep being stubborn I will go android again, even though I would like windows phone better:-)
I am willing to create such driver, or participate on its creation, but without support its impossible. Can this is ant, as ant device manufacturers representative get this support, to create windows phone drivers for ant?