CONFIRMED: LOST to be split in half.

It seems that, unless the strike ends quickly and abruptly, Season 4 of LOST will be eight episodes, half of the original order, and 24 episodes will air in 2008 in a fashion not unlike, say, '24', according to Kristin on E! Online.

Damon Lindelof had this to say:

"It's as much of a conclusion as, say, Ana-Lucia and Libby getting shot. An eight-episode season is an incomplete season, and I am not going to try to spin it any other way."

So there you have it, it seems pretty much certain that LOST will be broken up and the more days pass the less likely it is '24' will be on before September.