Well I'm an Asian player, I set up my home address in Canada (fortunately I do have a home there), but living in Hong Kong at the moment. I talked to one of the Square Enix person in AGS 2010 to discussed some of the topics on FF14 including account regions, and he said SE will not banned any accounts which are not set up in the listed regions, such as Hong Kong nor going to force anyone to change to the China server once the China service starts.
The problem I'm seeing so far is issue in registering an SE member account for payment, coz even after setting up C&B, SE still doesn't allow outside region to set up with their payment with C&B. So your only choice is to buy Crysta instead, try pay pal or Ultimate pay. But fortunately, for me, in the very beginning of the FF14 service, you can still link your C&B to your SE accounts so I did that, and my payment set up is now all set. Good Luck.
Heres a HK ff14 forum Gameweekly
If you have further questions, you can ask people there as everyone there mostly live outside of the game's region. There are discussion in how to set up the payment and SE account. Also, Figaro server is one of the largest in HK and Taiwanese community.
Heres a Taiwan FF14 wiki with info on how to register the Jp version of the game: 龍之語FF14百科 Edited, Jan 3rd 2011 1:56am by Nyariko