Not as far as I know. My guess is that there would be mixed feelings in the community about a parkour magazine though. There would be some that would embrace the idea in that it would be cool to have one place (not online) that you could find interviews, photos, tutorials, news about jams, news about media coverage, letters, fitness/training information, parkour-friendly places, etc. On the other hand, there would be some that would see a magazine as another sign of parkour losing touch with its roots. For those people parkour is a very personal journey, a grassroots movement, and a magazine would be seen as selling out.