Saw it coming, and yet I never saw it coming

To quote a previous post, razzle dazzle!
While there'd been rampant speculation that Juliet was a mole, a plant, a spy in the hosue of love, that last minute or two of Lost was a humdinger.
Overall, a really good episode, I thought, that answered some questions and - of course - created many others. And we saw some hot Other skin. The issues:
- So now we know why Juliet was recruited to the island and presumably why Claire was kidnapped. Questions that have sprung out of this - why are women on the island unable to conceive, to the point that it kills 'em? How did Ben spend his entire life on the island? Why is it so important that this particular issue be solved? Why not just bring children to the island?
- Speaking of Claire's kidnapping, obviously there was far more to it than Ethan going rogue, if some implant to feign sickness was actually put in her at some point (and how crazy is that?) Was her health ever in danger, since the kid was conceived off island? Obviously the Others put the implant in her just in case they needed to fake it later. Have they done likewise with other Losties? Remember, Sawyer has that operation scar from his captivity.
- My guess is Juliet is now a mole to scout for further pregnant women. By setting up this false Claire emergency, obviously that's going to drive any other pregnant Losties straight to her. Kinda interesting, in a way, her backstory along with Jack's comment when they were on the beach together - he's right, she wants to get off the island more than anything. And when he finds out she's playing him for a sucka, he's totally going to unleash Sayid.
- Speaking of which, regardless of whether she's a mole or not, that scene when she totally shut down Sawyer and Sayyid - you don't more blood on your hands - was terrific. Though we see how the Others know so much abotu the Losties, at the same time how believable is it that they know about what Sawyer did just hours before the plane crash.
- So for whatever reason, Juliet was not flown to the island, but taken by sub. Ethan made some comment about the flight there can be "intense." Speculations - electromagnetic interference around the island making flight difficult? Couldn't get the zoning for a landing strip?
- So this Jacob presumably can cure cancer? Who IS this cat? On the other hand, who's to say whether the sister's cancer came back at all. All we know is that Ben handed Juliet these medical records. Paperwork can be faked.
- Finally, so Juliet wasn't Ben's girl at all, she was doin' the black smoke monster with Goodwin. Perhaps part of her motivation for double-crossing the Losties is revenge for her boy being killed by Ana Lucia? Loved Ben's cryptic "see you in a week."
- Next week, Locke's back! Helicopter sounds?!
- Your thoughts?