RunKeeper released for WP7
RunKeeper is an extremely successful (more than 5 million downloads on iPhone/Android) exercise tracking application. As of today, Windows Phone 7 devices have a RunKeeper app of their own. RunKeeper will use your phone’s GPS to record your path and speed, and will even allow you to share your statistics on Facebook and Twitter.
RunKeeper is a free download from the Zune Marketplace.