Notifies you of song changes using native popup dialogs (via org.freedesktop.Notifications if you have it, kdialog if you don't). It is intended as a replacement for the built-in OSD.
If you are looking for notifications using libnotify, look at meerkat's NotifyAmarok: http://www.kde-apps.org/content/show.php/NotifyAmarok?content=103307.
Contact me if you want to add to the existing translations (English, Polish*, Spanish, Italian, Russian, French, German).
Feel free to leave any suggestions or requests.
*diacriticals do not work at this time