Update: Samsung just pinged us to say that Amazon put this page up in error, and that the Note 10.1 isn't yet available for preorder. And, sure enough, the page has been killed. (Samsung also points out the errors that many of you spotted in the specs as another clue that Amazon wasn't quite ready for this one to go live.) The good news is that Sammy's now well aware of how excited you all are for the Note 10.1, so there's that.
Original post follows.
Pop quiz: What's 10.1 inches in diagonal, looks like a Samsung Galaxy Tab 10.1 but acts like a Galaxy Note? Oh, and it's available for preorder at Amazon U.S. If you answered the Samsung Galaxy Note 10.1, you'd be correct. And for bonus points, you'd know that it's up for preorder for $549.99.
Amazon says it'll ship in 3 to 5 weeks, but it wouldn't surprise us if that's just a ballpark and it shifts either way. In the meantime, be sure to check out our hands-on from Mobile World Congress back in February to see what you're getting yourself into.