Here's Steve Politi's column from the Star-Ledger on the Giants and Jets Super Bowl bid. Makes a lot of good points about the potential cold and how it's eminently doable.
Interesting weather chart at the end, too. Although a New York/New Jersey Super Bowl would not have met the NFL's 50-degree requirement, the temperatures on the last Super Bowl Sundays around here haven't been brutish, and there has been virtually no snow. A couple of dustings lately, but nothing approaching the blizzard so many fear.