Apple staged a music-themed event Sept. 9 in San Francisco featuring Grammy winner Norah Jones to introduce several new features for its iPod devices and its iTunes App Store. But the most important news was that CEO/co-founder Steve Jobs was healthy enough following his March liver transplant to emcee the event at the Yerba Buena Center for the Arts. It was Jobs’ first public appearance in 11 months. Here are some of the highlights.By Chris Preimesberger
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