I have a couple of concerns, was it even verified that the Twitter account belonged to somebody who worked for Keys Factory? Twitter is full of fake accounts, I could go and set up a Twitter account and claim to work for Datel and say that we are releasing our first 3DS accessories on October 16, then delete it after a couple of hours to make it seem real (and that I was forced to delete it by my bosses).
I am not saying 100% that it's fake, I would just not get too excited.
As for importing, I would not do it. For one, I like the security of that warranty in case something goes wrong with the system. I also want to be able to register the system with Club Nintendo, and I have patience to wait for it to come here.