ActionScript 2.0 :: MP3 Streaming Player - Audio Buffering Visual?

I have written a little MP3 streaming player. Nothing big. But on some file, it takes longer to fill enough of the buffer before starting to play. My construct is fairly simple...

var player:Sound = new Sound();
player.onLoad = function(success:Boolean):Void {
if (success) {
// do something;
}}
player.loadSound(musicURL,true);

Since I have specified streaming, this will auto play as soon as the buffer is full. What I'd like to do is play a little animation or something while the buffer is filling so the user won't think the player has hung.