As always, lots of chewy tidbits to think over!
First off, thank you, producers and writers of LOST, for not killing off Ben. With the whole "Dead is Dead" episode title, and Ben confronting the "smoke monster" to be judged, well... I thought for sure that Ben was going to be offed. But there's more to that scene than meets the eye.
For a long time now, I've been contemplating the island's purpose for the ancient civilization that built its temples and statues on it. I theorized that it was a place that people were "brought" to in order to reconcile with their past experiences, be it to interact with a deceased loved one or a past trauma that they had to confront. As with a lot of the characters on the show, they have all had troubled pasts that they eventually atone for. This has become readily apparent by the reveal of the "judgement" room inside (or under?) the temple.
Ben's judgement reminded me of Eko's death in season 3. There he was confronted by the smoke monster, and after it had in effect "scanned" his past, his brother Yemi appeared in front of him. At first, Eko was overjoyed to see his dead brother, but soon realized that Yemi was not himself. Eko said he was not sorry for his past, which angered the smoke monster and beat the living daylight out of him.
Conversely, after Ben had been "scanned" by the monster, it disappears and his dead daughter Alex appears before him telling him to do whatever John Locke says to do. This isn't really Alex;
it's the smoke monster, first appealing to his emotions, and then manipulating those to get its way.
Also, the producers said in a recent podcast in response to a fan question about the full reveal of the four-toed statue, Damon Lindelof said "Will we ever see the front of the statue? I think that we will -- well, actually, I think we'll get a pretty good idea of what the front of it looks like before the season is over."
The picture Ben saw just above smokey's vent? Anubis, the ancient egyptian god of the dead. From wikipedia:
Anubis was the god to protect the dead and bring them to the afterlife. He was usually portrayed as a half human, half jackal, or in full jackal form wearing a ribbon and holding a flail in the crook of its arm[5]. The jackal was strongly associated with cemeteries in ancient Egypt, since it was a scavenger which threatened to uncover human bodies and eat their flesh[6] The distinctive black color of Anubis "did not have to do with the jackal [per se] but with the color of rotting flesh and with the black soil of the Nile valley, symbolizing rebirth."[6]
I'll have to wait to get an image of the picture again, but it looked as if there was an image of the smoke monster delivering something to Anubis. So, while this island isn't
purgatory, it may have appeared to be a purgatory-like location to the ancients who lived there or made use of the island. While Anubis may be a religious icon used to symbolize death, the smoke monster is part of the "real" world as it is according to Lost, and probably appeared to the ancient Egyptians that discovered the island that the smoke monster judged people and "delivered them to Anubis".