Hey, I never said it was a definant/official price. I have also seen others saying it could be as high as $500, although the lowest I've heard was the same price as the DS, $150. I don't believe it'll be $150 though. I mean think about what kind of stuff they are putitng into that little handheld and all the time that it's taking them. They'd lose so much money even if they sold 10,000,000. The handheld would simply cost to much to make. That's why I don't think $350 is that far off. We'll never know until it actually comes out though.
As for why the MAJOR sites don't have it yet just think about this. Where does most of this information start from, it isn't from any MAJOR site. It's always from a site like Slashdot or the Inquirer, not saying that they are always right though. There are reasons why they don't tell MAJOR sites, they don't want the people to know. I'm not saying that they told that site either, maybe they have some connections or something.
BTW, what is wrong with a Nintendo company telling us about something they heard at a game show convention? What you don't trust the competition?