Since its much-buzzed about debut at the Venice Film Festival in August, 'Shame' has become the source of much discussion among Oscar cognoscenti -- though not in the way you might think. After all, there is little debate about star Michael Fassbender's lead performance in the Steve McQueen-directed film about a sex-addicted New Yorker: he's towering, brilliant, heartbreaking and pretty much guaranteed to earn one of the five slots in this year's Best Actor derby. This despite playing a guy who may have had an incestuous relationship with his sister.