A fair few unanswered questions for me. I think I will leave this untill the others have watched to discuss though.

I was a relief that is wasn't revealed to all have been a dream though. That would have really sucked.

Absolute quality - this has been my favorite tv series. Not quite sure what to do without it.

Lost always came behind 24 and Prison Break for me, but it was better than Heroes, I got bored of that after 1 1/2 series.

Can't view that link at work. Still slightly confused. I was thinking that they all survived the plane crash, but died later no the island, and the alternate reality this series was like the moving on place? Although the fact they showed the plane wreck at the end maybe points towards what Crofty said, that they all died when it crashed initially.......which is basically like it was all a dream, which kinda makes me mad if that's the case.....

One positive thing though - I thought they ended it well with Jack closing his eyes (predicted by my wife about 3 or 4 minutes before the end - plot spoiler ).

I've been trying to read on Lostpedia what the ending means, and I quite like this summing up from some bloke on their forum:

I doubt fans will ever come to a kind of consensus on this, and I'm sure that's the way it was intended. But I'll tell you why I'm NOT disappointed at all with the show's finale.

A good number of fans here seem to be speculating on whether the sideways world was an alternate timeline or purgatory. I don't see it as an either/or thing. I think it's both.

The sideways world was the result of what happened when the bomb was detonated. As people have shown before, the detonation of a bomb would create a classic paradox. (If they detonated the bomb, then the plane didn't crash, and they never detonated the bomb...). So, because of that, two timelines had to emerge. However, one of those timelines wasn't our universe's true timeline. It was just something to had to happen to keep reality going the way it was supposed to. The true essence of everyone- their souls, or whatever, if you want to call it that- was in the primary timeline. The people in the alternate timeline were just copies, or echoes--exactly the same as the originals, but without their souls. So when they were awakened to the primary timeline, they weren't just discovering an entirely new life they had lived; they were discovering their real lives.

Since there were two versions of all these people, when one of them died in the primary timeline, they still couldn't move on to whatever was next until they died (until is used loosely here, because time isn't relative between the two realities) or somehow became aware of their true selves in the sideways reality.

So, in my opinion (and it's just that...and I'm sure that's what the producers wanted us all to be able to have...our own belief), the sideways world was an alternate timeline that functioned as purgatory, in a sense. It certainly wasn't the afterlife itself.

So what's outside the church door? Whatever you want, boys and girls.

Have since revisted my thoughts (it ws 5am when I watched them) and have looked at a few explainations and I think I have some sort of idea as to what the heck happened.

1. The plane did crash but they did survive and lived out their lives on the island and the short time off it for a few of them and at the end the 4/5 of them did fly home. This means Kate and Sawyer and co, got to live lives off the island until they died naturally or some horrific illness. Hurley and Ben remained on the Island protecting the light and poor Jack died not totally sure about Desmond.
2. The sideways life was a waiting room of the dead and once they are ready they go to the light - When you realise on the sideways that they are dead through Christian Shephard (anyone notice that names!!!) he says that time has no limit there. This explains a few things, firstly why Hurley and Ben are there (because they should be immortal in Island) as they would eventually die even though it could be 1000's of years later than everyone else, it also explains Kate comment of missing Jack for so long as Jack died on the Island she lived out another 50 or so years on earth in love with him. It also expalins the waiting list desmond wasn't allowed to see as the mother wanted to keep he son with her after knowing she killed him. It also shows that those left but were on the island still had issues to resolves or the truth to be seen, Ben stayed (I think) to eventually restore his relationship with Alex and finally it also explains why Penny was there as she wasn't on the Island but obviously died to eventually be reunited with Desmond. Also it was mentioned that the reason people were missing like Walt was because the deserted the original group - however I think it's because he is probably 20 years old with a deep voice and no longer looking like the young walt. Shocked the old couple were missing at the end. Think there was a little too many decent people missing from the church at the end but they were probably off shooting elsewhere.
3. The point of the island the reasons for all the crazy stuff that happened on it - well that I am still clueless about

In Summary
Plane = survived crash
Island = Real and what happened did.
Island = Still a bit of a mystery
Sideways = waiting room of the dead
Kate and Co = left island and live normal lives
Hurley and Ben - Lived to protect Island for billions of years
Jack = dead, but saved the day (wonder if that an omen for 24)
Desmond = who know??

Must admit I loved the rejoining of the people like Claire and Charlie etc I think the purgatory Idea was just put in as a feel good factor and nice goodbye to fans.

Some bloopers from the final episode that I thought were quite funny that I didn't notice, although I did notice the last one.

In the scene where the Man in Black asks Desmond if he knows where they are going, the same shot of MiB turning around in surprise is used twice. First when he is surprised to hear Desmond guess correctly that they are going to a "very bright light", then again when he hears Ben's walkie-talkie.
When Jack and the Man in Black are standing over the Heart of the Island, the rope hangs slack when he reaches the bottom but the wires of his harness can be seen on the left side of the screen.
Where Jack and the Man in Black fight in the rain on the cliffs, the aerial shots show dry cliffs and surfaces.
When the rain stops and Kate, Hurley and Sawyer appear, the ground around them changes from wet to dry repeatedly.
During the fight in the rain, several nearby cliff faces collapse but when the sun comes out the cliffs look no different than they did previously.
Kate's breath briefly fogs the camera while she talks to Jack after his fight with the Man in Black.
The number on the vending machine for the Apollo bar was G23, but Sawyer only presses two buttons.
While Jack is walking through the bamboo, the blood from his nose appears and disappears.
The amount of blood on Ben's chin changes between shots after Sawyer hits him at the Well.
The plane that Jack sees fly overhead as he lays in the bamboo forest is a different plane than the Ajira flight that had supposedly just taken off. The Ajira flight has bent wingtips. The plane Jack sees has straight wingtips.
The dress that Kate is wearing outside the church is a black strapless dress but it changes when she is inside to a blue halterneck dress.

Also, trivia question,

Who are the only 2 characters that arrived on the island in the first episode, to leave the island in the last episode for the first time?

Was it Claire?

I thought this was really hard and was tempted to google at first but then it is obvious, "Claire and Sawyer", I thought Sawyer and Claire left the Island for some reason coz of the sideways flash but they didn't.

I think it would have been nice to see Claire with Aaron in the real world and Richard reajusting. surprised he and his wife weren't in the church at the end?

Although it is obviously mistakes in shooting for the majority of the above faults, I can't believe that on a show where an Island moves, had radio active energy, a heart, monster and weird temples, that you would question the fact that cliffs fall and then reappear or it goes from being wet to dry really quick, surely this could be put down to island phenomenom and not poor shooting