The keypad, as the name suggests, makes it faster and easier to fill your correspondence with digital representations of your emotional state (not that typing a smiley face is rocket science, but typing 10 or 20 of those babies into one work memo can get a bit taxing, no?). ;-) Just hit one of the little white emoticon bubbles and watch your rage proliferate.
And good news for highly emotional folks: the keypad from Italian product manufacturer Lavatelli is customizable. It's still in prototype mode, but when it hits novelty shops, we'll happily let you know. :D