...Kingdom Hearts games don't take excessively long to localize. Due to popular demand, the game will be here fairly quickly as Square is going to ensure it releases here as promptly as possible. I highly doubt it will be here in a season as late as August. I find that a little absurd unless they encouter any game breaking bugs/glitches with the game that need to be rectified. 3-5 months at the very most.
April-June 2010 is the bracket I'm looking at. The longest release gap of a KH game is 6 months, and that's the original game. Kingdom Hearts II arrived in NA subsequently 3 months after its Japanese release. I find that odd as 358/2 Days took 4 full months to fully localize, albeit it is mostly text that needs to be translated and that's it. Either way, Birth By Sleep will definitely release here in the states within the next 6-8 months.
Either, I'm almost positive we won't have to wait that long anymore. That is of course...if Square doesn't delay the game like I'm anticipating on them doing.