[Thijs] has an iPod dock with an LCD display in it that allows you to watch videos without having to squint quite as much. Unfortunately, the iPod classic wouldn’t play videos on it because it’s not an Apple approved product. He figured out that an authentication chip is included in docks and cables that Apple has approved and set out to retrofit his device with one. He pulled the PCB, authentication chip included, out of a $5 cable from Deal Extreme and wired it up to the PCB on his dock. Voila, the dock now plays video.
This is a nice hack but it’s also just silly. You paid for the iPod, you paid for the music and videos (right?), and you paid for the dock. Why can’t they all talk to each other without authentication?