eyeliner - probably best not to get quite so riled up, but you have a point.
JonnyBritish - why is your question about US developers only?
My main concern is about performance. The technologies to improve performance on mobiles, like appmobi's directcanvas and cocoonjs only seem to have announced support for iOS and android. I want to make a mobile game, but the type of game I want to make will probably need the performance benefits they provide, as too low of a frame rate and it's simply too unresponsive. I've tried playing on iOS and android devices without them, and the framerate simply isn't high enough. I haven't had access to a win7 phone to try it, though.
If the performance is there, then yes I would be interested in win7 phones as a platform. Otherwise, I'm not so sure.
Thanks for reaching out to the community!