When Amazon.com announced its plan to open a digital music store to sell MP3s, you had to really work to get excited about it. It's hard to think of a press release that would be less surprising. At this rate, my 3-year-old daughter will be opening a digital music store pretty soon. And Amazon's selling MP3s? It's a digital music store. What else would it sell?
But Amazon's move was actually a strategic salvo in the great secret war of the $60 billion music industry, the fight over Digital Rights Management, usually known by the spine-tinglingly thrilling abbreviation DRM. What's DRM?...