Tidbits:

Remaining season rundown: Eko, Michael, Desmond+Various Losties.

The Sawyer "I'm walking here" thing isn't random. If we remember from Season 1, Sawyer ran into Jack's dad at that bar. They had some drinks and chatted. The facial hair and overall soused old doctor look is consistant in both episodes. Sawyer told Jack about the encounter. I think Jack's dad is definitely part of Dharma somehow.

Good call on the Jack's dad/Claire dealy. That's an almost sure bet.

As for Libby. She's not dead. It looked like a lot of blood ran down, but that was the wine for Hurley. She'll be in a coma til the last or maybe second to last episode where she finally fingers Michael as the shooter. She's got wayyy to much story for her to be dead. Her connection to Hurley and maybe Desmond. If she dies -- it better be early next season after one of her flashbacks.