A few popular radio personalities will soon be appearing at Apple’s flagship retail stores — The Grove in Los Angeles and SoHo in New York City — promoting iTunes 4 and the latest iPods. KROQ’s Jed the Fish will be at The Grove on Friday, June 20 from 6:30-8:30 PM, while WXRK’s Cane & Cabbie will visit the SoHo store on Friday, June 13 from 7-9 PM. The DJs will also “test your music knowledge” for a chance to win prizes.