Sometimes a video provokes so much emotion that you forget it's not real. In the words of Beast creator, Dr. Nemesis, "So far, facial animation has been very limited in Machinima. To get emotion across, most of us have had to rely on good acting, a well chosen sound track, and the viewers imagination, but not facial expression." In his current film, he uses Crazy Talk, Motionbuilder, and Sims 2, to overcome this issue.
When the scene opens, you see two men. One is tied up and the other is yelling at him. As the story unfolds, you learn that the man in captivity has deeply wronged the other man, to the point where he has nothing left to lose. With each facial expression, punch thrown, and gut-wrenching confession, you feel his pain.
While this is not traditional MMO Machinima, you can learn from the tactics he used. In the future, Second Life will be part of a hybrid-Machinima movement. Filmmakers are already using multiple programs to blend their works, such as MovieStorm, Poser, Crazy Talk, and iClone. As merging mediums becomes popular, I believe we'll see a whole new level of quality work coming from the community.