First off, I was legitimately surprised to see Mikhail again. I don't know why - nothing ever seems "normal" on the island. But...it looked to me his brains were pretty much scrambled and fried a couple weeks back there.
Can't figure out what's up with Juliet just yet - it seemed pretty obvious that she was trying to get info on Sun - and that she already knew Sun was preggers. I don't believe the whole "mystery" of the island has to do with fertility issues, but the Others certainly are interested in that subject.
Maybe the weirdest part of this epsiode was when parachute chick (or is it RPC?) told Hurley that Flight 815 was found and all the passengers were dead. I know early on in Season one, there was some speculation that the Losties were no longer alive and instead in some kind of purgatory. I seriously doubted that theory from the beginning, and don't put much stock in it now, but with RPC's revelation tonight....it does make one wonder. I really can't wrap my brain around the idea that the producers would jerk us around like that (what's next, are we gonna wake up and find Bobby is in the shower?), but if the Others, or someone, were able to stage a fake crash with bodies and all, that would explain why no one appears to be looking for them/trying to rescue them.
I need to think about this episode some more, but overall I liked it. I especially appreciated the fact that they didn't leave us hanging with regard to RPC. I was really afraid they'd focus on Locke or something this week and not mention her at all.