Myles - I think a lot of the questions will be answered as the reports progress. However I'll start by answering some of your questions, things I didn't mention at the time!
I would love to know how on earth you prepare for such a voyage
Everything seemed to happen either in an incredible rush or we spent days just waiting for things to be processed. A lot of things like visas were just a case of getting the instructions from Cunard, applying and then waiting for the results.
One of the enjoyable parts of the preparation was buying the guidebooks for the places we were going to visit and then planning out what we were going to do on each day. Each port required a different plan - were we going to do a taxi tour, a Cunard tour, go on foot, go to see one specific thing or take a tour that would just show the highlights.
We had to decide what Cunard tours we wanted to do and send off the form to book them. (Pointless as it turned out as Cunard said they hadn't received the form and we had to rebook).
There were visits to the doctor to get immunisations for the various diseases that we could encounter. We all got Yellow Fever because our doctor advised it but there were people on the cruise who didn't have it and felt that it wasn't required. Cunard's opinion, even when the cruise was under way, was that it might be

We had to organise some foreign currency. Most of the places we went would accept either sterling or US dollars so that made things much easier. We also had to take lots of travellers cheques just in case.
simple things as leaving the house for 4 months
It was a fairly simple course of action - ask your insurance company how you got cover being away for so long and comply with that. Ours said that we had to leave the heating on, ensure all the windows had locks and make sure that someone checked the house every week - we had some good friends who did that for us.
what to pack
We were going to be away for four months and were visiting everywhere from Panama to Cape Horn. We needed clothing for all climates from long underwear to T shirts and shorts. We banked on taking enough everyday clothes to last us two weeks, assuming that we would be able to have things laundered before those two weeks were up. Of course because we were visiting so many different places we needed too weeks worth of cold, temperate and hot climate stuff!
As well as the different climates it was necessary to pack different sizes of clothes. My waist size went up by six inches on the trip - the clothes I started off wearing when we sailed from Southampton wouldn't fit by the time we returned.
We also had to think about what consumables we would use. Things like tooth paste, mouthwash, shampoo, soap, washing powder, fabric conditioner, the list seemed endless. We had one large bag that was nothing but things we would use up on the journey. It's quite hard trying to think how much toothpaste, etc you will use over four months. There are brands that we like and didn't know if we would be able to get them outside the UK.
what not to pack?
We used almost everything we took. The only clothing we didn't wear was the long underwear because we didn't make the ports where it was coldest. Of the consumables we returned with a lot of tumble drier fabric conditioner sheets because we gave up trying to do most of our own laundry and we only used the stuff to clean the sole plates of irons once (we still have that and don't know what to do with it!)
how did you organise to pay the bills
Most things were done by Direct Debit. We were able to make sure that we had enough cash in accounts that we could access over the internet and transfer money as it was needed.
Our car had to be taxed whilst we were away - that was done over the internet from the far side of the world.
And onboard, how on earth did you eat the meals over the 4 month, did you start skipping courses or heaven forbid missing afternoon teas, (what do you mean you only had it once???)
A world cruise is unlike any other cruise - you go knowing that you are going for four months and that you have to survive for that time. You don't eat four big meals a day (plus afternoon tea) from the start because you know that you wont fit your clothes by the end if you do.
with hindsight would you have preferred to have had longer time to prepare.
Yes. Even at the time there wasn't long enough to mentally prepare for the journey we were taking. Had we booked further in advance (a lot of people book more than a year in advance) we wouldn't have felt the same pressure to get ready.
What didnt the guide books tell you about the big daddy of cruises
Guidebooks didn't tell us much about the cruise itself. With hindsight I wish I'd spent more time in researching the ports.
did you bond with the other world cruisers?
Yes. I'm still in touch with some.
what about the world cruise dinner?
That gets covered later

And what about "I wish someone had told me that.."
You get institutionalised. When new people join sectors of the cruise you start resenting them. They are interlopers on your ship! This was most noticeable on the final Cabin Cavalcade - not one of the full world cruisers went on the final one. We knew that we were being surlish but these people who had joined at New York really were interlopers.
I'm not sure that had I been told that I would have believed it but the feeling of resentment was tangible

can we really be expected to wait 4 month...
Yes

what did you think of your new home for a third of a year
We weren't away for a third of the year - when we returned it was with the intention of going back for another month.
did you ever, perish the thought, get fed up
Yes - see my notes on the later long sea crossings.
Oh and do you realise how lucky you were to do a world cruise on QE2, personally l would have loved to have done one.....
Oh Yes

And I'd like to do another one but not for a few years!