Once upon a time, the zeitgeist was something you chased. Billions of marketing dollars were poured into pursuing the alluring, fast-moving and almost imperceptible curve that remained just out of reach for all but the hipper-than-thou few. However, that was a long time ago. These days, the spirit of the age seems to be pretty much whatever Steve Jobs says it is.

Another iPhone Launch, Another Ripple in Apple's Marketing Muscle