Totally agreed... Juliette is DANGEROUS!!!
Sawyer and Sayid are on the right track as well as Kate as far as I can tell.. She is not giving in to the believing she is "on her own" as Jack believes.. Kate asked her why should I get Jack for you when she said that she could help fix Claire.. I think in days to come Jack is going to be in for a rude awaking about her..

__________________
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.