This article misses out on one of the most important things, something that CAN NOT be moved: Purchased apps.

Somehow, I have two different Apple accounts. Both are tied to the same e-mail address (which _should_ be impossible, and in fact, if I try to edit the profile of one, it complains that I can't do that since the e-mail address is already in use). This means that whenever I want to set up an iDevice, I need to log in to one account, download all the apps I want from there, then switch the App Store to the other account, and download the rest of the apps.

Of course, Apple support told me to pound sand. But at least they were friendly about it.