You hate Rove, his vicious tactics and all that he stands for. You want Rove to be a traitor. You hate Miller for her biased "reporting", and yet you admire her "courage". She's jailed in the name of journalism and privacy, isn't she ?
What if Miller was the traitor here, and Rove was just a careless idiot ? Consider this scenario: Miller was the first to learn about Plame, through illegal means. She discloses the info to Rove, maybe accidentally. Rove then gets careless and leaks the info to somebody else.
In this scenario, Rove wasn't even aware that he was leaking sensitive info. He wasn't aware of the importance of what he knew, or what he disclosed. He learned about Plame from a journalist, and carelessly used the info to mount his attack on Wilson.
As for Miller, why would she rather go to jail than to speak ? She's not fighting for journalistic freedom; she's covering her ass. She gets jailed for a year, and she appears to have integrity.
In reality, she has used illegal means to learn about Plame. If Miller reveals the true source of her information, she faces a sentence far worse than a year in prison. If she reveals her source, she will be shunned, she will be a traitor and a pariah to Republicans and Americans alike.
This is pure speculation, but it makes more sense than most theories out there. Miller is a criminal.
Are you too blinded by your hate of Rove and your desire to see the Republicans fall to consider that maybe he is nothing but a careless idiot ?