Originally Posted by torifile
This is not entirely true. You just have to wait to port until you get the phone. They can't do it up front, but it won't void the rebate if you port your old number (I'm speaking from experience).
Are you sure your experience was with Cingular? This is from Amazon's site as of today:
"Cingular and Amazon.com have not yet established a method for customers to transfer their current number to a new Cingular account. Unfortunately, in order to port your previous number, Cingular will cancel the account that Amazon.com activated and will activate a new account with the ported number. This process makes you ineligible for the Amazon.com rebates. We hope to offer a porting option in the coming months, so please check back."