I had to watch it twice to take it all in, lol.
I was trying to work out who's funeral it was that Jack went to. It's gotta be either Ben or Locke, I think.
nah, I don't think either of those two would be willing to leave the island. I think it's Sawyer actually, or someone who we just haven't seen yet.
I doubt it's Sawyer. When Jack phones Kate it's obvious that they've agreed never to meet (until now) for a reason. Presumably that reason is because she's with Sawyer, and Jack loves Kate, and it'd cause problems, so better for them to agree never to meet. Plus talking about the funeral she says "Why would I go?", so that rules out Sawyer.
It has to be someone they both know from the island, and Jack says it's not family or a friend, so it can only be Ben, or possible Locke, because of the amount of times Locke has sabotaged their plans Jack might not consider him a friend, and Locke is a loner so he hasn't made the same friendships many of the others have.
As for the newspaper J.... ..ntham.
There's a philosopher from a few 100 years ago called Jeremy Bentham. John Locke's name is also taken from a philosopher. Possibly Locke using a pseudonym?