Things to notice:
* Jack had no tattoo during his flashbacks w/Sarah so it's obvious he got it after his divorce from her. During the first few episodes of the show, Kate was bantering w/him about hit tattoo but he wouldn't tell her what it was.
* I have no proof of this but my instinct is telling me that Sarah left Jack for Desmond. They were all at the same place at the same time when Jack met Desmond running those stairs. Desmond even asked him about his belief in miracles.
* When the creepy beared Other guy dragged out Kate, he asked
ALEX to bring her out. Isn't Alex the French womans kid that the Other's took?
* Ethan might not have been part of the Others. Ethan referred to what he would do where as creepy bearded man referred to the plural. He also looked a little confused when Jack brought up Ethan. So then who the hell was Ethan & what was he doing there?
Good quote:
"From the dawn of our species, Man has been blessed with curiousity. Our most precious gift, without exception, is the desire to know more - to look beyond what is accepted as the truth and to imagine what is possible" - Alvar Hanso
Bearded guy said something similar to this to Jack.
* Wouldn't it make more sense to ask a person w/military training like Sayid to help train the army instead of the cop? Of course, Sayid is still heartbroken & is a born-again pacifist so he may tell Jack to go to hell.
Finally, all hail Sawyer & his penchant for nicknames!
Jack - Doc
Kate - Freckles, Hot Lips
Sayid - Captain Falafel, Muhammed
Hurley - Pillsbury, Stay-Puft, Jabba
Claire - Mamacita
Locke - Mr. Clean (you need an earring and a mop had me laughing my ass off)
Walt - Tattoo (as in Fantasy Island midget) and ShortRound (from Indiana Jones & the Temple of Doom)
Michael - Han
Jin - Chewie
Ana-Lucia - Rambina, Ponce DeLeon
Eko - Shaft
Boone - Metro
Shannon - Sticks
Others bearded guy - Zeke