Gizmodo pointed me to an article about what should be a great idea: Lego Headphones.
Legal implications aside, the problem I see with these particular Lego headphones is that they were designed in such a way to not connect together. What is the point of Lego-anything if they don’t stick to other Lego-like things!? Lego headphones that stick together would both be awesome and functional. Also the same manufacturer could come out with other Lego accessories such as a Lego case which would make owning the headphones even better.