From Today’s Ask Ausiello segment.

Question: What does the strike mean for Lost? Any idea how many episodes they finished pre-strike? Is it still scheduled to air some time in February? — Mike

Ausiello: Why do I suddenly feel as if I’m talking to myself, Mike? Why do I also suddenly feel like I’m not going to like what I have to say? At least I know the answer to that second part — it’s because I don’t like what I have to say. If the strike extends into the new year and beyond, there is a chance ABC may opt to delay the new season until the fall. Or worse yet, February 2009. Another scenario has the network simply airing the eight episodes already in the can this February as originally planned — something Team Darlton would not be in favor of. Says Lost cocreator Carlton Cuse, “Damon [Lindelof] and my concern about running the [eight] episodes we will have made is that it will feel a little like reading half a Harry Potter novel, then having to put it down. There is a mini-cliff-hanger at the end of Episode 8, but it’s like the end of an exciting book chapter; it’s not the end of the novel. Damon and I didn’t write [the ending of Episode 8] differently [with the looming strike in mind]. We wrote it to be the ending of Episode 8.” In any case, he concedes that the decision to hold or air the episodes isn’t ultimately theirs. “It’s really [ABC honcho Steve MacPherson's] call,” Cuse notes, adding, “No one was happy with the six-episode run last season.”

Source