Lost is a complilation of world religion and literature and folk tales to form a new Creation Myth; that is, a parable of Awakening for the new millenium. See my blog, Quigley in Exile

While there are certainly a lot of references to religious aspects in the show, I wouldn't go too far with the theory that the whole show is designed to portray one particular point of view or religious theory. I've heard plenty of things that suggests that, if anything, the creators of the show are more interested in pointing out the fallacies in various religious beliefs rather than promoting any specific one (either directly or in between the lines).

Also, I generally am skeptical of any theories that basically attempt to explain the entire concept of the show in any way, especially ones that emphasize a particular interpretation that the producers have not confirmed. It seems to me that it's one of those shows that's easy to read a lot of things into, so it's ripe for that sort of over interpretation.