I know you're big in pushing for state supported DO schools, which is fine, but many states don't have the money currently to support any medical schools, let alone DO schools, where a bias exists as you mentioned.
Also, when I think of DO friendly states, I think PA is also pretty DO friendly. It only has 2 private DO schools, PCOM and LECOM. Seeing as how PCOM is over a century old, and LECOM is one of the biggest DO schools in the country, it seems that was all it took to make relatively DO friendly (despite of course the costs of malpractice and physician fees). I also expect that Arizona and Florida will be pretty DO friendly in the not too distant future. Afterall all of those SOMA and AZCOM and LECOM-B and Nova graduates have to go somewhere.
To be honest, I think one of the biggest factors that has given DOs more recognition is the simple fact that more of them are in the field now than ever before. Organizations like LECOM and Touro that educate DOs in droves are probably contributing a lot to this. There's a reason why DOs are fast approaching that 1/4 of US medical graduates mark, and its because of expansion due mostly to schools like those.