Ultralite 2000 FM Radio (29.95) Listening to Howard Stern may or not be fashionable, but wearing a radio headset would never be considered high style. Until now. The smallest of all FM radios is 1.5 inches tall, weighs less than a quarter ounce, runs on two standard button-cell batteries and comes in five designer colors -- an electronic earring for tuned-in trendies. An even smaller AM version will be available in October for $24.95. Both are made by American Technology Corp. Call (619) 679-2114 for information.