When is Lost starting back again?

Damn it.... I have finished watching Lost... well almost. 3 epidisodes of season 4 left and then what?

I tried to find out when it was coming back to finish the season but had no luck browsing.

Do you like Lost? Is it worth getting all jittery over, waiting for the new episodes?

And most importantly... Will they get out of the slump and bring back revelations that I can't keep guessing?

Maybe everything, if it goes on too long, is subject to formula. That's what math has us believe and after all Lost is full of math conspiracy!

Anyway I am looking forward to it's return.