I had read and/or heard that tonight's episode would focus mainly on the kidnapped Lost-ers, while next week will go back to Locke/Desmond/Eko.

I agree with Lilith that this was reminiscent of the first season. I was talking to one of my roommates about that actually. The thing is, JJ Abrams actually wrote tonight's episode, as he had many of the first season's episodes. He was MIA most of last season, as he was doing MI:3, which is why last season had a less supernatural feel. But this season appears to be going back to it. Exciting stuff.

__________________
I see your fantasy... you want to make it a reality

Are you in the mood to be subdued

You see these shackles
Baby I’m your slave
I’ll let you whip me if I misbehave

Tie me to the bedpost

I like it rough
cause I'd rather feel pain than nothing at all