Do the new Apple In-Ear Headphones work with the iPhone?

I can’t seem to find any conclusive information as to wether or not the new Apple In-Ear Headphones work with the iPhone. The website doesn’t show them as being compatible with the iPhone, but I can’t believe that they wouldn’t be. Are only certain features compatible with the iPhone? Does anyone know? I have the 1st generation iPhone—I’m not sure if that makes a difference.