Apple topped Wal-Mart for the first time as America's No. 1 Music Retailer. The online music store previously edged out Best Buy for the No. 2 spot.
The L.A. Times reports:

It's a major milestone," said Tom Adams, president of consulting firm Adams Media Research. "It is the first instance of an electronic venue surpassing a [bricks-and-mortar] retail venue for any kind of media delivery."