I am slightly leaning towards the capture of Ben by Danielle being a staged event.
I mean...why was the leader of the others just wandering around near the Losties camp, without armed guards, unless he planned on being caught and using the Henry story?
So the plan could have been:
-Ben needs surgery
-From Ethan they find out that one of the crash survivors is a surgeon
-Ben wants to get close to the surgeon
-They get Danielle to stage his capture, and intentionally wound him so he'll require the aid of a doctor
-Being the doctor, Jack spends time with Ben
-Jack goes to the other island and give Ben surgery.
See I do believe the capture was a staged event, only from Bens side though. Danielle wasn't aware of any plan, the others knew how to manipulate the situation to get what they want which in this case was an entry into the Losties without seeming suspicious. From there Ben knew he could work on Jack, Sayid just stuffed with his plans

I do agree that Danielle wasn't aware. By what I could infer this is the scenario:
1- Danielle arrives as a Dharma security.
2- The purge of the othrs takes place. Danielle is the only spared because she is pregnant.
3- She lives with them until she gives birth. In this time she learns about the ways of them.
4- After Alex is born she escapes before being killed. Know a lot of the island and the others she is capable of making the broadcastand hide in te island.
5- Later she can meet with Alex, and starts a relationship with her. Alex having only a stepfather believes on her mother.
6- She finds Sayid, that does not act as the others, tells him about her story, avoiding details of Dharma and the others.
7- Ben goes to get Locke, and get caught on purpose on the net. Ben tries to run when he is with Danielle and Sayid, probably because he wanted to be found by Locke. Remember that he had staged the Henry Gale history, to ensure that he could convince Locke.
8- Danielle hits him and his plans start to fail. Danielle probably is hoping that if the survivors kill the stepfather of Alex, it will be easier to recover her daughter.
9- Ben works Locke on the lockdown.
10- Sayid blows his disguise. He starts to work Locke on a different way.
11- The others make the decision of rescuing Ben. They use Michael to do so, and as a plus get the doctor to operate on Ben.
13- After Kate and Sawyer get back, a worried Danielle decides to help them, fearing the revenge of Ben. But still never leaves the cover of the woods.