Fed up with a radio diet of mind-numbing talk shows, music playlists tighter than Kirstie Alley in toreador pants, and all-news stations that double as a cure for insomnia? Apparently, a lot of other people are too, and they’ve reached for the sky . . . satellite radio, that is. With a banquet of channels, unfettered playlists, quality sound, and everything from continuous DJ sets to sports to news to punk to multiple channels of rock and soul, 2004 was the year that satellite radio joined the iPod as a must-have item for the electronic cognoscenti. Market leader XM grew to 3.1 million subscribers, while Sirius topped the 1 million mark. Does this signal a return to being able to hear new music on the radio? Sure does . . . and better yet, more exposure for those who make and record music.