LOST - Did they ever really answer anything?

So Locke and Eko discovered the Pearl, apparently discovering that the push the button order is really just a test as someone had been watching the pushers. But now the questions turn to...

Who is watching the watchers?
Eko and Locke clearly saw a camera above the TV bank. Is the Pearl just another experiment like the Swan, where the subjects are just given a basic order and see if they follow it.

Who is the guy on the videotape?
On the original orientation tape he is Marvin Candle and only had one arm. Now he is Mark Waxman(?) and clearly has use of both hands. Did he lose one in the 'incident', is the Swan's orientation tape newer than the other one. Or did he gain a new arm through one of the many programs Dharma is running.

Why is the Orientation tape a different format?
Could be important, might not be. One film is on a chunky old style tape whilst the other is on classic reel.

Did he mention a 'ferry' on the tape?
At one part during the tape it went fuzzy and the screwed up as he was talking about after they have finished there observation that they should get on the ferry to go back.

Well two more weeks left. Then summer of re-runs.

Hearing rummors that the next season may start a little later to ease up on re-run weeks. Just wish they would show it like 24, uninterrupted.

Next question: What will be the end of season cliffhanger?