I said it earlier, technology can be amazing. Last year, I noticed a lot of people carrying more sophisticated hardward during the run. Some have these high tech GPS watches that will give you your pace time, location, calories burned, and where you are in relation to other runners of your class (probably even tells you what you had for breakfast). Some will carry their iPhones (too much weight for me to lug 13.1). There is even an app for those who really want to see where they are on the course.