Even as it attacks DRM on music, Apple is continuing to add more DRM to its own hardware (we recently documented all of Apple's various hardware DRM restrictions). The latest example is the new iPod Shuffle. According to the careful reviewers at iLounge, third-party headphone makers will have to use yet-another Apple "authentication chip" if they want to interoperate with the new Shuffle.
Normally, of course, independent headphone makers could simply reverse engineer the interface. The "authentication chip" is there so that Apple's lawyers can invoke the DMCA to block those efforts. So this shows us, yet again, what DRM is for -- not stopping piracy, but rather impeding competition and innovation.