Ever since iPhone launched, Steve Jobs has been denying the possibility of stylus on Apple's touch screen devices. Stylus. Why would you need one, when you got this amazing, finger operated multi-touch interface on a device with a super responsive capacitive touch screen.
It is true in most cases. Except one - when you need/want to actually write or draw something on the touchscreen display. Finger really sucks as a writing tool on touchscreen.
Unwired View, Is Apple warming up to iPhone stylus idea?