Found this while searching Youtube for a while. I love the human/worgen diffrences of the males. Also, perfect voices for the goblins.
Worgen Male http://www.youtube.com/watch?v=8QkjDunNuPM
Worgen Female http://www.youtube.com/watch?v=js-XNLDeasc
Goblin Male http://www.youtube.com/watch?v=xstSp2U5C3k
Goblin Female http://www.youtube.com/watch?v=Y0UlFkDctiE