@patrick excellent write-up! This is a part of my daily routine as well: http://www.tanita.com/en/bc568/
Metrics for other dimensions of fitness really help define goals. My fear about fit bit type products is they create external motivation for wellness
@patrick nice! thoughts:
1) Nike+ Running uses GPS vs the sensor to track your workout. love that app.
2) you can sync Nike+ workouts to FitBit with fitbitd: http://j.mp/XtUyTX
3) Withings can sync to FitBit, keeping everything in FB’s ecosystem