Here's an interesting take on Ben that I found on IGN's LOST message board......
1. First its clear new time line Hurley, has a great deal of definitive memories from his other life. As he recognizes the cop that freed desmond/kate/sayid.
2. I think Ben is trying to manipulate the man in black. Here is my reasoning. First, he sent Charles and Rousseau to his closet. But he sent miles into the forest. Before that however, he insisted to have Charles and Rousseus walky talkies. After which he gave one to miles. And he kept one. I think he intended to buy the MiBs trust, by giving him Charles, and his lackie. But he saved miles, so why would he save miles, only to go on a candidate killing spree? More over, the fact he sent Charles and Rousseau to the closet, and miles to the forest, suggests he had a preconcieved plan.
He planned to bring the MiB back to his closet, thus giving him Charles and Rousseau. He planned it before the MiB made a deal with him. Why would Ben repent passionately about killing Jacob for a half decent reason. Then plan to meet the MiB the man who convinced him to do it, and promise to go on a killing spree, all before he is told about the reward? Ben is a lot of things, but a cold blooded psychopath, is not one of them.
I think ultimately, he will sacrafice himself in some way to kill the MiB. Which will bring his redemption arc, that has existed this season (reinforced by his alterate time line counter part), to a great end.