Frankly once you get it, you're not going to give a flip about what name they've assigned to it.
As far as names are concerned, there is no specific way they choose them other than the fact that so many names have already been taken it's getting hard for them to get one they can patent, so no one else will use it. That's one of the most frequent deciding factors.
I couldn't wait, so I bought one from a good friend who is a distributor in Hong Kong, it's unlocked and unbranded with no carrier logo.
This SGS II is the very best smartphone I've had ... period. It's shocking just how good it is at absolutely everything. And believe me, with all the phones I've had I'm pretty picky.
No matter what the wait, you will be so glad you did. It's my understanding from a very reliable source that AT&T will get theirs first, and soon.
Then they will roll out the rest in random order.
Cheers