I wish I could draw cool flow charts! Because I would make one for the dual boxing changes.

Turns out that FFXIV will have it's own service center. For PCs you can dual box on one SE account and one Service account, you just need a code for each character. Two play two characters simultaneously on PS3 and PC you need 2 SE accounts and 2 Service Accounts. and to play two characters at the same time on PS3 you need 2 SE accounts, 2 Service Accounts and 2 consoles!

Phew!

And you can only register 1 PS3 code per service account... o.o