Dude, don't use Amazon to get your games! I have been cheated out of stuff from Amazon WAY too often to ever go back. There's a Penny Arcade that perfectly captures my feelings on Amazon:
Gabe: Have you gotten Space Invaders Extreme yet?*
Tycho: Nope, I ordered it using Amazon's "you send us money, we never ship it to you, ever" feature!
Gabe: Wow. You should check the mailbox. What if it came?
Tycho: *checks* Nope, not here!
Gabe: It'll be some awesome when you don't get it.
*That's not the game they're discussing in the comic, but it works here.
I've had the game since its release, and it continues to doll out awesomeness on a daily basis.