Are you talking about a piece of film strip? Was it a preorder bonus? I didn't think they would pack those into a regular release. But that does explain the film strip I saw on someone else's blog... it's a picture of... the credits. 
edit: Wait a minute, you got it really fast. Did you use some sort of Express shipping?
Yes, that's what I'm talking about!
It's cute, I just can't find any use to it xD And yeah, it was probably a preorder gift, as I ordered the regular version only.
Well I chose the Fedex option, which costs like 15$ and, I don't know if it's because I live in Canada, but I have to pay another 25$ when I get my copy delivered at home. So that's about 40$ more, but it's worth it. I was actually supposed to get it yesterday, but they had some problems at the customs office.