I was trying to upload some files to my player and had emplode warn me that there was a duplicate file, so it wasn't uploaded.

What would be cool is if emplode offered to make a shortcut in the given location when it detects a duplicate.

So, let's say I already had "Time" by Pink Floyd in one playlist, and I accidentally drag the file onto the player for a different playlist. When emplode detects I'm trying to upload a duplicate file, it would ask if I want to create a copy of the existing version of "Time" into the new playlist.

Yeah, that'd be good. Except that emplode doesn't spot duplicates in different playlists yet, anyway. If you did what you describe, you would end up with two copies.