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I had never heard of Jack before reading this article either, but got a good picture of how it works with this passage: "The new image would be modeled more on the iPod's shuffle, with an automated playlist of thousands of songs from the last few decades, and no disc jockeys. With little bits of patter between songs now delivered in a prerecorded, just-not-that-into-you drone, Jack was about as genuine as a 2 a.m. pickup line. And for me, just as promising. Like Rush, Men Without Hats, and Dudley Do-Right, Jack originally hails from Canada. His "variety hits" format took its name from a Vancouver DJ's on-air persona and migrated to the States in 2004."
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