They should adjust the order price when it ships. Or at least that's what happened for me with Dredd 3D. They'll send you an email letting you know the price difference, too.
You'd have to be an idiot to do that, considering that the individual prices of the three new games included in the Orange Box add up to $80, and so I somehow doubt the would sell a pack for cheaper than $50 or $60.
The only reason people were pissed that the Black Box was cancelled was...
Oh, my copy of SKATE that was missing was in my mailbox today, meanign I guess one of my neighbors put it there because it's too early for the mailman to have come.
So I just signed up for and got credit for At Home Rewards, but now when I try to sign up for Privacy Matters or Simply You it says I'm ineligible, even though I used a different credit card. Am I missing something?