I've already pre-ordered from Amazon, and it's going to cost me 35 USD to get it shipped with 3-5 days of Dec. 20th, priority mail being the only option. If I have to download the early access pre-launch client from EA's Origin doohicky, then I'll have to wait for the actual discs (unless it works via a VPN).
Otherwise, I'll just have to "bite the bullet" and miss opening day... by a week. Then again, this might also help avoid the inevitable server overload and crashing of Day 1.
As of now the EA/BioWare has been saying no IP blocking anywhere, and this was usually in response to people inquiring from Australia/NZ (which are not included in the initial launch). So, if they say it will work fine (albeit with some lag) there, I assume it will work in Korea/Japan. Also, they must know that a lot of American GIs will be jumping on from day one, especially in Korea/Japan -- they are also the ones often asking in forums about non-Europe overseas access.