Ok, repeating myself from earlier when last week I spoke to Amazon about the price drop and I'll emphasize "$559.99 . This is the price you'll be charged for this item when the order ships.":

Hello,

The discounts we offer vary from time to time. I see we currently offer a greater discount on "Nokia N900 Unlocked Cell Phone/Mobile Computer with 3.5-Inch Touchscreen, QWERTY, 5 MP Camera, Maemo Browser, 32 GB--U.S. Version with Full Warranty" than we did at the time you placed order #_.

Since this item hasn't shipped yet, I adjusted the price to reflect the current discounted price, $559.99 . This is the price you'll be charged for this item when the order ships.

So I expect for them to stand by this. Period.

BUT the rebate for does say:
between November 16, 2009 and December 31, 2009....and...Mail-In Form, dated store receipt and UPC/barcode panel ...

So if they want to stick to the rules and my Amazon invoice reflects the date I actually placed the order, I may not get the rebate, but still a decent price.