Whenever you start on any exercise, kick of Sports Tracker and tell it what activity you're doing. Position, speed, time, and an estimate on energy burned up will be recorded, and at the end of each session you can upload this to the Sports Tracker website to join all your other sessions, no matter what device they were captured on.
I've been using Sports Tracker to keep an eye on my cycling around Edinburgh on a variety of devices since Sports Tracker was first launched (as a beta from Nokia Labs - it's now been spun out as a separate company), and all that historical data is worth a lot to me, so I'm really glad I can start collecting new data on Windows Phone, and analyse the older data when I want.
Sports Tracker is also celebrating the launch with a chance to win a Nokia Lumia 800 to run the application on. It's being powered by their Facebook page, just 'Like' their page and answer a few questions and you might have a little bit more motivation to keep on running. Or cycling. Or power-hopping...