We Make Money Not Art is a blog that's always worth a look, they have a lot of stuff about the intersection between art, design and new technology. As a keen knitter, I loved this story about a couple of students, Magdalena Kohler and Hanna Wiesener, who hacked a 70's knitting machine so that it turns your voice into a secret binary design on a sweater.
Just say a message into a microphone and the frequency of your voice is analyzed by a computer and turned into binary code that the machine will interpret to control 24 servo-motors which will turn your words into knitted pattern. And hop! You can wear an individual voice message on a sweater. No one will understand the message, it will stay in your head. The pattern doesn't just depend on the words but it varies also according to your modulation, whether you are excited or totally introverted.
Isn't that neat!