Meet the Run Beacon: a smart device that lets you store your run data while using a treadmill. It can track your pace, splits, and other important data as you walk or run on your treadmill. You will be able to sync your data with FitBit, MapMyRun, and other apps. It tracks more than 400 data points/mile.
The above video shows the Run Beacon in action. You can find the product on Kickstarter.