Dunkin' Facebook fans can register for the contest through Facebook Places or Foursquare. Participants can check in at Dunkin' locations nationwide (up to once per hour and up to 10 times per day each week).
Based on number of check-ins, five grand prize winners will receive a prize package that includes a 50" LCD TV, a Dunkin' Nation President $200 personalized DD Card, and an exclusive Dunkin' Nation President T-shirt and mug.