Haven't posted in this thread for a while. I won one of the thousands of "message in a bottles" that were given out for the "LOST: Final Season Sweepstakes".
I'll post what I got in spoiler boxes, because it seems kinda spoilerish.
My "message in a bottle" contained a paper wrapped in twine that had the message "Nothing is Irreversible" and a USB flash drive meant to look like the Emergency Key that Desmond used in the hatch in the Season 2 finale.
On the Flash drive is the last 2 minutes of last season's finale and what looks to be the first minute of the season premiere.
After Juliet manages to set off the bomb, we see Jack sitting in an airplane, not just any airplane, it's Oceanic 815. Except this time, the plane gets through the turbulence and presumably makes it to LA.