APPLE’S new iPod Nano, which boasts a pause-and-rewind feature on the FM tuner, could spur a new interest in radio, according to a survey conducted by Vision Critical Communications.The interactive features show the potential to energize interest in radio among younger demographics who are the heaviest users of MP3 players, the study found. In an on-line survey of 1,185 American adults, 47% of those aged 18 and older said they are "very interested" in the ability to pause and rewind songs they hear on the radio, and this rose to 66% among 18 to 34-year-olds.The opportunity to see the name...