Before you think kinky :-) -- it's my Garmin Forerunner 305 I'm talking about.
Just Super.
Won't bore everyone w/ all the tech details, but it has an excellent built-in GPS and tracks you (walk/bike/run/etc). Can then download the track, save it to a website (i'm using runsaturday.com (link below)), analyze your effort, blah blah.
Bottom line- it worked, and so did I! , had fun.
My Workout.
Map:
