I am determined to put the possibility of Ben having gone after Penny in his down time firmly out of my mind. To help with this, let's play Fun With Proxies:
1) Obviously, Frank is the proxy for the poor dead pilot. Let's hope Smokey doesn't find him quite so tempting. (I loved how well he took the whole thing. "We're not going to Guam, are we?" indeed.)
2) I'm betting the guy in line behind Jack at the airport is a cop and is proxying for Ana Lucia. He even gave Jack his condolences, just like she did.
3) The woman escorting Sayid is the proxy for the Marshall.
4) That leaves Ben (who isn't even supposed to go back to the Island, but since when has he let things like rules stop him?). It's possible that, since he was born on the Island, he's proxying for Aaron. Unless....
5) Kate is pregnant with Aaron's proxy. Her reunion with Jack would be very well timed for such shenanigans.
6) This has nothing to do with who's proxying for whom, but if I'm ever absurdly wealthy I'm going to build my own crazy pendulum room. Just because I can.
I love that Hurley thought to buy up all the seats he could. And Jin is with Dharma! How far back are they? (And how much do you want to bet that he's the one who taught wee!Charlotte Korean?