Cross-referencing in wikipedia, there is a Temple of Set, a group of occultists who practiced in California. Part of there practice was delving into metaphysics. Is this some loose correlation to the church above The Lamp Post? Weird.
There's also a benign deity named Ash, also called Ashit, is associated with Set and was a protector of royal property. Also loose, also weird.
With the wide array of influences, specifically the wide array of analogous mythology and stories about magical islands out there, there's no telling what is connected, what is coincidence and what is a red herring until we see more.
I'm finally tired and satisfied with what I've read, not just for Lost's sake but for getting back into mythology, so I'm going to bed!