New "Rambler" shoes connect to your cell phone via Bluetooth, and send out tweets to your Twitter feed about what's going on with your feet. The data takes the form of the words "step" and "tap," and a period when nothing is happening. So when you're sitting at your computer tapping your feet, tweets look like this: "…..tap tap tap…. tap." When you're walking, they look like this: "step step step step." This is why Al Gore invented Twitter. (Props to Nerd With Swag)
