Krisitian references an extensive and fascinating poll completed by the BBC: What the World Thinks of America. Here's the full coverage, and it appears that you can even watch the program online. There was apparently a debate, and Canada was represented by the CBC's Peter Mansbridge.
All of the survey data is pretty interesting (and well rendered), but this particular chart stuck out:
I don't know what Brazil is thinking, but check out the American response. Who else do they think the superpowers are?
I've said it before and I'll say it again, the BBC is hands-down the best TV station in the world. This reminded me of some shtick on a hilarious Canadian show called This Hour has 22 Minutes: Talking to Americans.