Well who that is still alive has "visited" someone

Walt

Is there anyone besides Walt? To me that could mean she is dead.

That makes me wonder why Sawyer could see and talk to her, as well as Hurley, Ben, and Locke.. She was fine when they made camp even said she was feeling better.. maybe she had internal injuries that finally took her life after they went to sleep?? I really don't know..

__________________
Please don't give up, Des. Because all we really need to survive is one person who truly loves us. And you have her. I will wait for
you. Always. I love you, Pen

DESMOND: I love you, Penny. I've always loved you. I'm so sorry. I love you!
PENNY: I love you too.
DESMOND: I don't know where I am, but--
PENNY: I'll find you, Des--
DESMOND: --I promise--
PENNY: --no matter what--
DESMOND: --I'll come back to you--
PENNY: --I won't give up--
BOTH: I promise. I love you.