Well, i dont know what kind of format it is now, cuz' i dont use winamp (
), but i think its somethin like: "artist name - song title", or other way round.
What you can do is create a QuickText, give it an alias like
/wat (or whatever you want of course) and text like "I am listening to (!WAT)". You can also add different colors (ctrl+K), format tags, etc. etc. etc...