Not quite an answer or even (much of) a speculation, but...
...when Ben said he didn't know what the smoke creature(s) is/are, for once, I wonder if he's telling the truth. What if he DOESN'T know? I wonder if Richard and the other, um, Others know, even...
Which of course makes one wonder when they WILL get more into it.
You know, I noticed something kind of odd. When the Smoke Monster stopped in front of Mr. Eko in Season 2, and the camera (in an awesome shot) moves THROUGH it, images flash inside it...images of a church, his brother Yemi, and a bunch of other things (as seen
here). Later, of course, Yemi appears to Mr. Eko shortly before he gets killed by the Smoke Monster. Later, When the Smoke Monster chased after Juliette and Kate, and stopped outside of the tree, it "took pictures" of Juliette, flashing a bright light while she stared wide-eyed at it. Could it have been doing a similar thing with her? I hope not, for her sake...
Just a few thoughts.