My thoughts on some of the issues in this thread:
"I know what you are boy" was definitely a reference to Ben being a manipulating murderer.
Penny and Daddy poo are now arch rivals, especially after Penny reconnected with Desmond after he went missing. She's in love with Desmond more than ever. Plus she knows her daddy hates him so all the more reason for them to be at odds. I think the tracking station in the snow was part of Penny's efforts to find Desmond before Widmore does b/c she knows what her daddy's all about.
To me, Widmore being Ben's constant is a no doubter (thus, the reference to not being able to kill him). This could explain so much!
A buddy of mine really believes that everything will fall into place with the entire LOST story as we find out more and more about what happened in Ben's life between boyhood and the present. So much missing - and I seriously doubt the missing time period was filled with lounging around on the couch at "bookclub"!