alternatively or additionally, it would be neat if it could prick my finger and record my blood sugar level, as diabetics do every 2 hrs.
most lifetracking mechanisms seem very foolish to me, especially when "lifetracking" actually means recording my internet use and socializing behavior. however, fitbit is really on to something with collecting data that is only useful if consistently obtained, and then it is quite useful. if i knew exactly how many calories i was consuming and expending i feel like i could tweak my lifestyle in a significantly positive way. whereas now, i'm not sure which activities and foods are really having an effect.
edit: more precise sleep recording would also be cool. that tends to be the most hazy event blocks on my completely filled calendar.
also, i'd need something to record swimming, since salamander wrestling and underwater hockey consume much of my time.