On iOS, you have the ability to increase the run length from 30 minutes to 1 hour, by increasing the number of songs that play between story clips – and we’ll be bring this to Android as well in the future. However, once you’ve finished a mission, you automatically switch into ‘radio mode’ where you get receiving transmissions from the in-game radio station, so even though the mission has finished, you’re still getting story!
And yes, you can run the game at the same time as Nike+ and Runkeeper!