This is an online recording of a AM broadcast show "Amateur Radio This Week" that talked about eSSB audio in particular. They discuss its history, implementation, legality, and its use. It is about 29 1/2 minutes in length, and be sure to have either nice headphones on or use nice speakers to do it justice. You might want to get yourself a cup of coffee, water, or soda before you sit down and listen:
http://www.nu9n.com/images/twiar_630.mp3
http://www.nu9n.com/images/twiar_630.mp3