I have found a great plugin for WINAMP. It analyses any song and displays the chords in real time as the song plays. It's pretty acurate as well.

Check it out at :

http://easy-chords.cbms-networks-inc.qarchive.org/

It really does work surprisingly well.

So the question is, any chance at all of porting this across onto SC?

It would be a great addition, especially for any muso's learning songs.