By Preston Jones, Fort Worth Star-Telegram, Texas Jun. 8--The world of digital music downloads is, put mildly, one of blindingly rapid change.By Joe Kirby That ringing in your ears is the deafening buzz starting to again surround the biggest technology story of the summer: the release of the iPhone.By Preston Jones, Fort Worth Star-Telegram, Texas Jun. 8--The world of digital music downloads is, put mildly, one of blindingly rapid change.