http://consumerist.com/2008/03/25/as-a-way-of-saying/

As a way of saying sorry to Guitar Hero III customers whose discs only supported mono sound, software maker Activision is sending out free faceplates to attach to your electronic axe. Not sure if that makes up for the 3-4 weeks people had to wait for a replacement disc, but good on ya, Activision. [Infendo]