I run once or twice a week, usually 45 mins. I have a pair of running shorts that have a small pocket in the front of them. I just stuff the N900 in there. I usually have it playing music while I run since I have a Garmin watch that I wear for tracking and heart rate.

My biggest problem is finding headphones that don't get pulled out of my ears. I've loved the ear buds for years now, but after about 10 minutes everything gets sweaty and the motion of running (and gravity) starts to pull them out.