This is a cool map of the U.S. showing Twitter "tweet" trends throughout the game. I find the most shocking discovery to be that the internet has finally been discovered in Montana, Nebraska, and Kansas.
http://www.nytimes.com/interactive/2009/02/02/sports/20090202_superbowl_twitter.html
http://www.nytimes.com/interactive/2009/02/02/sports/20090202_superbowl_twitter.html