I want to go back to your initial post and make a couple of comments.

In my opinion, starting with the air ticket product is not the best way to go about planning a year-long journey. Obviously this is FT, and the Oneworld forum, so people are inclined to tweak itineraries and talk about how your trip fits into Oneworld's menu. However, you might be better served by thinking about where you want to travel and when, and then see which air travel product works best for you, rather then bending your plans to meet the routing or rules imposed by an airline marketing alliance.

For example, in your wish list you include "Pacific islands." Well, the Oneworld Explorer is downright terrible in permitting access to Fiji, Tahiti, the Cook Islands or other island groups in the Pacific (nearly impossible, in fact.) Star Alliance, on the other hand, offer's Air New Zealand's very comprehensive coverage of the South Pacific, so that might work better for you. But then, Star's coverage within South America, or internally within Australia, is miserable. Tradeoffs.

You've already been told about the problems with OW and Africa, i.e. no connections between southern Africa and other parts of the continent.

You also need to know that you have to keep moving in a generally eastward or westward direction, between the three "regions" designated by the airlines - Americas (Region I), Europe/Africa (II) and Asia/SW Pacific (III). You can't go from Region II to Region III and then back to Region II before going to Region I, and so on. These rules hold for all RTW products, not just Oneworld's, so you need to think about the order of places, because doubling back is generally not allowed.

Think about when you want to go to places, too. Take South Africa: August is great for safaris because it's the dry season, cool, and the animals are easier to spot with all the foliage down. On the other hand, Cape Town is wet and dismal. In December Cape Town is great, but it's rainy, buggy, and hot in the north. Same goes for Queensland v. Melbourne, and so on.

So with a year of proposed travels, I'd recommend a fair old bit of homework on the destinations, then go shopping for air (and land) arrangements to fit your plans. Keeping the RTW ticket as a "backbone" is the only way to do it with plans like yours, but be aware that like all things these products change - rules are modified, routes and destinations added or dropped, prices change - both in absolute terms and relative ones as currencies float around and "cheap" origin points like South Africa or Korea are replaced by the flavor of the day...

Planning is great fun and these products can be fabulous bargains, so don't dream small. But keep the cart and the horse in the proper order.

Oh, one other thing - do NOT overlook the frequent flyer mileage earning opportunities RTWs represent. It's not terribly difficult to leverage a second premium-cabin RTW journey out of a paid one - that's right, a twofer - if you play your cards right. Your travels may represent a great year-long experience, but you'll probably want to travel again down the road, so try to help offset those subsequent trips by bulking up your mileage accounts with your present plans.