LOST Theories (will have spoliers)

[Jeritron]

Originally Posted by RoXer What did the bomb do exactly? Is that the reason why it's at the bottom of the ocean? Because it's "dead" in this afterlife? The bomb "killed" it? Do I have that right?

In the afterlife the island is a distant memory, and I guess that's why it's dead and not a factor. That's just a way of showing it.

The Bomb didn't have anything to do with anything in the afterlife though. The Bomb either never went off, or was neutralized by the electromagnetic pocket.
Whatever happened there was The Incident, and the Dharma initiative just sealed the area off and finished the hatch, and remembered it all as a bunch of crazy bastards causing mayhem.
Jack and Co. magically travelled back to 2007 right after. I don't know if The Incident caused that, or just The Island's will. Probably both.