YES. My cell phone actually has a voice recorder built-in.
I usually mark a track from the remotre then leave myself a detailed note on my cell.
However,
"Marked" currently has 2 values. "yes" and "no"
I propose that the "marked" feature loop through several tags.
so insted of the "Marked" button just toggling through "yes" and "no"
it would cycle through a bunch of markings like:

re download
re rip
normalize
duplicate song
delete track
fix tag

This list of course would be parsed from config.ini
so you could have an unlimited number of user definable markings to cylce through.