Cyanide

Any ideas on who was born? I am thinking that the identity of that child (boy?) is going to be important in the backstory.

It can't be Locke, as Locke would have already been alive as a child somewhere else.

It can't be Ben, as he will already be one of the children on the island (Horace is too old by this point, compared to his relative youth when he welcomed Ben to the island).

And it couldn't be Whidmore. Once again, wrong timeline.

Could it be Karl? That just wouldn't be interesting. Karl is probably a little young for that as well. Ya, alot too young. Scratch that.

Farraday, Desmond, Sawyer, Jack...all possibilites (with significant backflips in the story), but all fairly useless to complicate things in that fashion.