Well, this is just my guess based on some observations and reading what some others have thought but I think she's dead for the following reasons.
1. She left her baby in the jungle, by itself, unprotected.
2. She did so after seeing her (un)dead father holding said child.
3. Charlie's dead.....there's really not much point for her to be around.
4. Also, just in general she hasn't really served a purpose in quite some time and I'm guessing they've got to make room for a new character or two.
5. Miles - the person who can see/communicate with the dead - was staring at her with an awful lot of interest during the whole episode. So much so, Sawyer onscreen made mention of it several times.
6. She should have been killed in that explosion in the first place.
7. In real life, the actress who plays her is rumoured to want off the show.
8. It's clear from Kate's flash foward that she considers Aaron
her child now and that's permanent.
9. It's also clear from the flash-foward that the baby is a very touchy subject for Jack, probably because Jack finds out he had a sister on the island with him all that time and he never knew until it was too late. (You know Jack, he'll blame himself for not being pyschic or something....)
10. Finally, the promo for the episode did say - rather ambigously, granted - that the island would take one of the survivors for it's own.
Granted, these are circumstantial pieces of evidences but I bet I could get a jury to convict.
It would be interesting if they did some reveal to show Claire's burned body in the wreckage of the exploded house..
This is
exactly what I think we'll see. Someone (probably Locke and Ben) will be sifting through the wreckage, looking for something, and find the body at the very end of the episode. Queue the freaky-someone's-in-your-bathroom-going-to-stab-you-in-the-shower music and fade to the black "Lost" screen.
