... The face-off between XM and Sirius might well be unprecedented in modern business history. In most industries, the competitive landscape is populated by many rivals. But satellite radio is truly a rarity -- a duopoly of combatants slugging it out for potentially huge gains. Eight years ago, when the Federal Communications Commission awarded two licenses for satellite spectrum at a price tag of $90 million each to American Mobile Radio (now XM) and CD Radio (now Sirius), it created a perfect laboratory setting in which to observe raw, one-on-one competition. ... Link: Fast Company | Written in the Stars.