Listening to: Nothing.
On the way into work today, I noticed something strange on the BART ride. Looking out the window, I saw moving pictures. It was something very similar to how a zoetrope works. I didn't catch enough of it to make out the content, but I knew it was animated and it was pretty fantastic.
I later searched and realized that advertising companies are using this technique to push Target and the iPod.
I was pleasantly surprised.