Accessories for use with particular personal electronic devices, namely, with portable computing devices, portable digital data storage media and devices, handheld personal electronic devices, namely, digital media player devices, audio and video players, personal digital assistant, handheld wireless devices, cellular handsets, and handheld digital audio and/or video capture devices, said accessories being electronic and non-electronic user interface and interactive devices, namely, [ user input devices, ] protective cases, carrying cases, holsters, non-electrical couplings, non-electrical adaptors, stands