Looks like they are going to be kit deals. Either with a 5DM2 or 580EX II
Corrrection: Looks like the IR Amount is the regular "rebate"/instant rebate. And then if you buy it with the 5DM2 or 5DM2 KIT, then the instant rebate will be doubled. I'm not clear on what the 580II "kitted" part number gets you in terms of the instant rebate.
Here's the text of the email (those are Adorama part numbers, btw.. and they wont be appearing in their system until Sunday):
here's the pdf (yousendit link)