actually android is the most open main-stream phone distrobution. with android you can release an apk on your site and people can install it on their phone also there are many 3rd party app stores so you can effectively side-step google (unlike apple where you can not do this unless your device is jailbroken.)
to get around some of the hardware limitations you can also get us to run a companion app on windows also you can make a "rooted" version of your app that takes advantage of people who are using a phone with root access.
cheers
