Lost Season 4 Episode 1

Last time I wrote about Lost, I was saying it was only ho-hum and not as great as the likes of 24 and Heroes. Well, I've finally caught up to the current season (4) and I am hooked! By end of Season 3, I was confused as hell and want to know what the hell is going on. I've finished watching all the episodes available on abc.com, but I just realized they don't have season 4 episode 1!!!! By the episode recap, it sounds like a darn important piece. I'm dying to watch it and it's annoying the heck out of me that it's not available. Did anyone Tivo it???