(Editorial) A new NPD report was released this week, and to no one's surprise, Apple has increased its market share. According to the market-research firm, 28 percent of all music is being purchased on iTunes. Apple's store easily bested Amazon's MP3 marketplace, which accounted for 12 percent of all US music sales. Walmart also captured 12 percent of the market. Out of the entire digital-music market, NPD claims, Apple controls a whopping 70 percent.
