Go check out this spec fic by kho about what happens to Sawyer, Walt, Jin & Michael after the raft sets sail. I won't say anything else, except that I really liked it.
Shoulda, Woulda, Coulda.
She hasn't cross-posted, so it's our little secret for now. ;-D
Lotsa great fics out of her lately. See sawyerficrecs for another rec.