additional MP3 file info?
 

This mightn't be the place for this, but...
Is there a way to send and receive even basic information in addition to the title and artist that's normally attached to an MP3?
Maybe it's already there and I'm ignorant?
I could create a text file to accompany each tune but since I use SoundJam and the info tags are already written shouldn't there be a way....?
For instance, how do you use the annotate feature in the Library and what for?