I picked up mine from Singapore- but this was actually a direct import from HK as they have not yet been released in Singapore. No problems at all (I'm from the UK)- the firmware is universal, unlike Nokia phones, and there is no regionalisation on the HK model I have.

BTW you will not find one of these in Thailand yet- they're actually pretty thin on the ground in APAC at the moment.

If you do get one from HK, I would definately unbox it at the store and make sure it fires up OK and has no dead pixels. I went through a couple before I found one I was happy with, and even then the backlight is a bit uneven on the right hand side (but then I'm a fussy git)!

Good luck!