Remember the good old days of MSN Messenger, AOL, Yahoo Messenger? They usually had a new message received sound effect. Facebook and other apps usually have one too and I thought it would be cool to have a feature added to the Shout Box, when someone sends a new shout, a simple sound would ding. Anyways, just a suggestion!
Even a ding for the messages feature would be cool too. "You've got mail" xD