Just got my copy from Japan today. I'd ordered it long before it was announced here. I was a little annoyed when it did get announced here as it's a lot cheaper to buy a US copy than a Japanese copy. So as I couldn't cancel my order at the time, I figured I might be getting a bit better disc anyways.
But man, is this ever a sweet set! I've no idea how the US version is packaged, but the Japanese release is awesome. It's in a serious steel case (about 1mm thick, or 3/32") that makes the case that the T2 Extreme Edition comes in look like cheap K-Mart crap!
So far I'm glad I didn't cancel the order when I had a chance. Don't know when I'll have a chance to watch it as I've got to finish watching the 2 other movies I got yesterday (LOTR: ROTK & Underworld The Unrated Extended Cut).