I know this is off topic and a bit geeky, but I was wondering if anyone with an iPhone has tried the MotionX-GPS application to track their flights?  It was designed for tracking workouts, like for mountain biking and jogging.  But I couldn't help but wonder how it would work as a poor man's GPS.  The basic "LITE" app is free, full-featured app is only $2.99 (almost free).  One user comments that it works better than his $500 GPS.  Is this possible?

 

I just downloaded it and plan to try it out this weekend.  Maybe it won't even work at altitude, but since it gets its signals from GPS satellites, maybe it will surprise me. 

 

See http://gps.motionx.com/overview/  Check out the picture of the iphone mounted on the handlebars of the mountain bike, with the MotionX app running.  Now picture your instrument panel with the same mount.  Pretty cool, and very cost effective, assuming you already have an iPhone. 

 

Mark S.