Sorry for the double post. Here's an article that says that the chip is just a control circuit chip. It is not used for DRM. A bit of a tempest in a teapot, eh?
When you disassembled the headphone, did you notice any kind of authentication chip? There's a small brouhaha going on sparked by a reviewer on iLounge.com asserting that the an Apple authentication chip is required for the headphones to work with the new shuffle. I find it a little hard to believe that there is such a chip in the headphones, so just wondering if you saw anything unusual. Thanks.