Ledger's Legacy: A new generation's James Dean?

In this image released by Warner Bros., Heath Ledger stars as The Joker in "The Dark Knight." Ledger is an overwhelming favorite to become, on Sunday, only the second actor to win a posthumous Oscar. If he does, the words "Oscar-winning actor" will doubtless precede each mention of his name forever. But beyond that, what will his legacy be? (AP Photo/Warner Bros. Pictures) ** NO SALES **