http://www.nytimes.com/2008/11/30/arts/television/30ryzi.html?ref=music
Though Sundance executives made suggestions about guests, along the lines of Beyoncé, in the end Mr. Costello, Mr. Furnish and Mr. John made most of the invitations themselves. “Not everybody that plays an instrument is actually that interesting,” Mr. Costello said.
Mr. John added, “I just wanted to make a deeply intelligent set of programs that, in years to come, people can look back on as a historical reference.”
Despite that shared interest in history, after more than three decades in the music business Mr. Costello was tiring of pop stardom himself; last year he was telling friends that he was done making records. “And I really believed it,” he said. “It wasn’t so much the making the record, it was all the other nonsense.” Instead he made guest appearances on albums by Lucinda Williams, Jenny Lewis — she’s also on the show — and Fall Out Boy. That last request came as a surprise: “I didn’t even know they existed,” he said. (He agreed, he said, because they seemed sincere.)