You can knock on your phone if you have new emails or texts, and if you really had one of those Von strike again. And 'different for each voice message is received (SMS or e-mail). If you shake the handset, you can see, if you have unread tweets and RSS feeds and more, have more bells telephone.
The idea behind this concept is similar to that of a kid Rattingen a box of candy to see how he left chocolates. Another very cool feature is the ability to tap the rhythm of a song on the screen and the device will recognize the melody simply through your taps. Very good idea, I must say!