If you're from the New York area, or will be there on May 15, you have a shot at meeting the band at a 'Meet and Greet' at the Best Buy on 44th St & 5th. The first 500 people to purchase "21st Century Breakdown" at that location (you have to buy it at that Best Buy location) will get a wristband that allows you to get in line to have your CD signed by Green Day. Only one wristband per person, no cameras allowed, first come first serve. Store opens at 9am, so be there early if you wanna be one of the first 500.