I just purchased this Nike+ Sportband yesterday and I love it.  Basically, it tracks the distance and pace at which I walk/run and I can upload that info to my account on the Nike website and participate in challenges with other people across the world!

I am not a runner at all but trying to work up to running while I am in the process of losing weight and getting healthier.  Here are my last 5 runs / walks.  Check back soon to see my progress...

Check out www.nikeplus.com for more info.