According to this http://inside.nike.com/blogs/nikerunning_news-en_US/2010/06/07/introducing-a-new-way-to-track-your-heart-rate-progress?cp=usrun_NPA_15June10 there is now a way to track your heart rate with your run in Nike+. If anyone gets one or has one please let me know so I can update the site to track the extra data. If it didnt require a 5th generation iPod I would already have one heh.