Hey - I backed the kickstarter and found out something interesting regarding payment.
If on Amazon.ca, you will only find 'add a credit card' for payment options. Amazon.com the wording is 'add a credit or debit card'.
I have unfounded concerns my backing is somehow not going to get processed when the time comes, because I've had sleeping problems for two days in a row and apparently 40 hours and me is a weird place to wind up.
But yeah, for those looking to use debit and amazon, make sure to use the .com one. Not sure what's up with Canadaland's version there.