Just watched the episode again and I've just picked up on two things during Hurley's flashforward bit.
When Hurley returns to his house he hears whispers which are coming from his family (who are hiding to suprise him obv.) but it just showed you that the whole island thing is still very much in their lives and it was just the way they did the whispers like on the island. It amused me though
But the main thing I picked up on was when Hurley's Dad comes over to Sayid and Hurley he says "Hey! How's everybody doing? (Laughs) What are you talking about?
Building a fire or huntin' boars?" The and look on Sayid's face after he said that just said to me that Hurley has told his Dad something about the island. I mean fair enough you'd build a fire if you survived a plane crash and it's kind of 'let's make a joke out of this' for Hurley's Dad but the hunting boars bit isnt something you'd say if you didnt know about what they'd been through. Fair enough you could say it was a coincidence. But there's no coincidences on Lost is there?

And the writers don't just through any old line in, if it's on the air then there's something behind it. And let's face it what has Hurley kept secret during his time on the island? As Sawyer said "If Hugo knows, everybody knows."
Any my point is as much as I love Hurley he isnt one for keeping secrets and I'm just saying he must of told his Dad something for him to make a remark like that.
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#5 The first time I heard myself on the radio.
#4 Dad teaching me to swim at Butlins.
#3 The Christmas Liam gave me the ring.
#2 Woman outside Covent Garden calls me a hero.
#1 The night I met you.