As if there weren't enough iPad jokes already, it turns out that there's a Japanese product - a high-tech adult nappy - called the Aipad. You can guess the pronunciation by the fact that I'm even writing about this.
The Aipad has apparently been around for a while and has "two lines of aluminium [which]can be connected by clip with a small sensor unit. When the nappy soaked, the sensor notifies it via radio waves." Basically it lets people or their caretakers know when it's time for a nappy change.