Well, this is my first official attempt at a theory thus far with lost (on a website that is). I've attempted to write a few here and there, but always get near the end of my theory, and see the swiss cheese-like holes all over it. Hopefully it will not be the same with this one.

So, the Blast Door Map has opened us to a number of new insights and thought-provoking issues. One of which is the location of these other hatches or bunkers which are displayed on the Blast Door Map. One such location is The Flame, or the hatch directly to the left of the Swan hatch.

I've been rewatching some episodes to see if i can spot anything helpful to add to the Blast Door Map, and have run across one thing so far. In Maternity Leave (S2-E15), Claire and Kate find the Medial Hatch, or The Staff, which is two hatches left of The Swan Hatch. You will notice that there are markings in between the hatches. Some believe these to be tunnels connecting the hatches. But due to their constant twists and turns, and inability to actually CONNECT two hatches, i think otherwise. I believe these to be one of two things: roads (which if this were true, i think the Blast Door Map would point it out) or most likley, rivers/streams.

In Maternity Leave, after they have headed back to the beach, the Maternity party (Claire, Kate, and Rousseau) pass by/through/over a stream. If my observations are correct, and these markings ARE rivers/streams, then they had to be somewhere NEAR the Flame Hatch.

Not that the Losties KNOW to look for other hatches yet because Locke only just found this Blast Door Map, but if they did, all they would have to do is comb in between the Swan Hatch and the Medical Hatch, and i am almost positive they would find the Flame Hatch.

So that's that. Let me know what you think. But gentle with me...i'm a bleeder...