Actually, I didn't try it since I dont use winamp/listen to music...
But I probably guess that the song name updates after there is a new one.
You should update the nick every 5 secs for example because you might not like the song that is playing.
Then you click the next song button and you dont like that song either.
So you click the next song button from winamp and the nick updates.
If the user that is in your contact list has the "User has changed nickname" from Plus! it would be a little annoying..
By the way, you should update your sig
Also, thanks for the credits
/ 
