Tonight's 'Lost' Finale: Which Major Mysteries Will Be Revealed?

Evangelinelilly_lost So, I just got off the phone with a friend of mine who has seen tonight's two-hour fourth season finale of Lost. Whaaa?! I know.

When I took the call, the foremost thing on my mind was scoop of course. Stupid me. Somehow, I guess "loyalty" and "confidentiality agreements" took precedence, because gleaning info off this buddy of mine was like pulling teeth from a bitchy Jaws. No matter. Truth be told, I hate getting spoiled on Lost. I do. Last year, I knew about the flash forward a few weeks in advance and it sort of ruined the finale for me. So, I didn't flip when my friend was vague about this evening's main event. I simply appreciated what was thrown my way. Here's what so-and-so had to say:

There will always be debate in the Lost-verse, but as a true fan, I have no qualms about saying that tonight's finale is the best two hours of the show so far. I can't spoil it or I'd feel like I was cheating you. I will only confirm that the following questions may (or may not) be answered:
-What does "moving the island" actually entail?
-Why did only six survivors make it back to civilization, and why are those survivors lying about the people who were left behind?
-Why is Kate pretending that Aaron is her biological child? What is this boy's significance in the greater scheme of things?

What a tease, right? Well, I'm hoping my pseudo-source only brought these questions up because they will be answered in some form or another tonight. Weigh in below on what you wish to put to rest this evening...