Episode 13 is as far as anyone has gotten, anywhere in the world. The other episodes haven't been released yet. As for Jack playing football with the others, it's still speculation, but he promised Ben that he would stay until the wowund from the surgery healed. He also made a deal with Ben, who said he would let Jack and Juliet off the island. For spoilers, I would go here :
Lost Spoilers
Sailing away - If you are right, that will be so freaking cool.