I did it! I ran a half marathon today. When I was done, I plugged in my ipod and realized I have also run over 100 miles with my Nike Plus. Follow this link http://nikeplus.nike.com/nikeplus/v1/html/milestones/print_certif.html?id=1089886213&region=us&language=en&locale=en_us&dateFormat=MM/DD/YY to see. If you don't know what Nike Plus is, please let me share my favorite running tool with you! It's this nifty sensor that goes in your shoe (you can buy a pouch off Amazon so it can go with any shoe, not just Nike) and it sends a signal to your ipod tracking your miles, calories, time, speed and more. I love it and wouldn't do my marathon without it!