Gizmos land among CES 'mega-trends' as U.S. sales rocket It's all about portable music players and flat-panel TVs. One look around the floor of the Las Vegas Convention Center confirms that, with much of the space devoted to companies pitching all manner of MP3 devices and big- screen televisions. And no wonder - U.S. shipping revenues of portable MP3 players in the first 11 months of last year were up 224 percent over 2004. And sales of flat-panels - LCD and plasma sets - are expected to go from $6 million in 2005 to $10 million this year, helped by...