True, it was good to see someone looking after Jack. I get the feeling that he needs looking after, even though he wont let anyone.
Thinking about it, I am slightly disspointed in Jack..as referenced above, he appeared to make certain "promises" to Juliet..and whilst I doubt Ben loves Juliet, Jack did appear to make commitments to her..yet he didn't waste any time getting onboard the chopper did he
Perhaps their 'thing' did end after the appendectomy, but even so..why make promises you can't keep?
That said, I hope Sawyer stays clear of Jules. If he isn't good enough for Kate in the real world..up against all those 'world class surgeons'..then he surely will only get hurt by Juliet, who gets through her men like Smokey got through O-town in 4.09.