From Ars Technica’s Apple passes Wal-Mart, now #1 music retailer in US: “Over the past few years, we have watched Apple climb the music sales chart courtesy of the iTunes. Last month we learned that Apple passed Best Buy to become the number two retailer in the the US in December. Now, Apple has ascended to the top of the charts, surpassing Wal-Mart for the first time ever.”