No providers, HTC is a cellphone manufacturer, they do not provide cellphone service. More than likely, when the Touch Pro and Diamond come to the United States, they will be stripped of their glory. No Front Facing 3G Video Conferencing camera and also probably won't be called "HTC" anything.
Weird names aside, you will be able to most likely find it for Sprint, Att, and hopefully T-Mobile.
T-Mobile will have the HTC Touch Pro (or whatever name they give it), Att will have the touch pro as well, and Sprint will have the Diamond (or whatever name they give it)