But what if I have added say 15 new songs to a folder that has 300 songs. If I drag and drop the entire folder over again, won't it create duplicate playlists?

What I really wanted, was a way to hit a sync button (for those familiar with DreamWeaver), have emplode see which songs have dates later then the last sync up and add only those songs.

I've been doing the drag and drop method all along. I guess this is the easiest way to do it for now.