She might bow out before the end of the primaries, but whenever she does bow out she is certain to endorse and campaign heavily for Obama.
She has been focused mostly on the issues since the last debate. Arguing over policy doesn't qualify as an attack in my view. She will likely soften her criticism of his empty resume though.
And she's not responsible for what anyone does outside her campaign. (That's more than Obama followers will allow; he's apparently not even responisble for what his campaign does as long as it doesn't come out of his mouth in public.)
I see Hillary going back to the Senate, becoming Majority Leader, and running again in 2012 or 2016 - And winning.