If you are going to do RTW regularly, I think it is a good idea to carry the local numbers for the ticket offices in Europe, JNB, and Seoul (for example). That way if you get stuck somewhere where the RTW desk is closed in your current location, you can talk to one on the other side of the world where they are in regular office hours. In a pinch, you can also contact the One World Help Desk. Any One World ticket agent should be able to connect with them (you will probably have to insist, but they can do it.)

Here are the ones I carry (there may have been some changes, but these were the latest I've had:
US (800) 247-3247
Seoul +822-733-4154
S. Africa +272721-440 6440

The AONE4,5,6 is still a useful product. It is no longer the deal that they used to be, but for people who do multiple continent flying it sure beats regular F round trips.