If you have an iPhone 4 and you couldn’t get the sensor to link up, you’ll be happy to know that today’s iOS 4.0.1 update fixes this problem. It does not, however, make it compatible with the Polar WearLink+ chest strap to track your heart rate. Happy running!

The video I cut together from the North Star Roller Girls “Jump the Shark” event is now in my portfolio: go check it out!