Currently I have an mp3 archive on a fileserver, and add to it from other
computers and OSs.  This makes it very hard to maintain my music files through
rhythmbox as I like to, sometimes forcing me to delete my library and re-import
all files to avoid duplicates for example.  What would be nice would be to able
to tell rhythmbox that a directory is watched, and when it starts it detects
files that have been newly added to the directory.

IE: look at the files and see if
 - not in it's in the library xml file
 - hasn't been noticed before

So that when starting rhythmbox I might be a prompt that the following list of
files have appared in the directory, would you like to add them to your library.

Or, add them automatically (ie: almost like an itunes shared playlist that
changes as the source changes).

Either way, rhythmbox needs a way to deal with files being added to your source
directories more gracefully I think.