Since its inception, the iPhone has been praised for its clean interface and responsive touch screen. Usability gurus have both praised its interface and scoffed at its touch screen. Say what you want about the benefits of a touch screen, there is nothing that matches the physical feedback of a real button and no indications or assistance for those with disabilities. That could not be more true for the visually impaired, where an all touch screen interface is as useful as a handle on the spout side of a teapot. Until now. … »