I recently found a very useful website for electronic  Biblical Resources.  It is ‘housed’ at Gordon College (where I used to work part-time in the mail room while studying at Gordon-Conwell) by Ted Hildebrandt.

http://faculty.gordon.edu/hu/bi/Ted%5FHildebrandt/

What is relevant for this website is the info on Song of Songs.  He has a couple of articles posted, but more important, he has posted 4 audio lectures of Dr. Lloyd Carr.  Dr. Carr was a professor at Gordon (I assume he is retired) and wrote a very valuable commentary on Song of Songs in the Tyndalle series.

I hope that you will enjoy his lectures.  I have not had the time to listen to them yet :)

http://faculty.gordon.edu/hu/bi/Ted%5FHildebrandt/OTeSources/22-SongOfSongs/SongOfSongseSources.htm

Blessings,

Chris