There’s so much conflicting data out there on whether or not MP3s and digital music distribution affect CD sales, but this is a first : Eminem’s as-yet-unreleased CD is currently the 2nd most popular CD being stuck into CD players, according to Gracenote. Also interesting that Gracenote can track popularity of CDs being played regionally (presumably by mapping IP addresses to geography). Not that I feel sorry for Eminem, mind you, but anyone who insists that digital music means more record sales has to take this picture into account.