Every time I think of this I think "If my gym were smarter about game mechanics and WoWed up all their participation stats I would have +5 Abs of Steel and Epic Purple Arteries by the end of summer." (They've taken wee baby steps: at the end of the workout the screen will say "You burned 120 calories, which is an apple." and "Yay! You've completed your 17th Tokyo Marathon." That's great, but I think two guys and a couple boxes of ramen could do much better.)

Hopefully soon we can engineer an eat watch http://www.fourmilab.ch/hackdiet/e4/eatwatch.html

The rest of the Hacker's Diet is worth reading and has an excellent analytical approach to describe the eating (inputs) and energy use / exercise (outputs) of a simple model for your body.

I've been brainstorming a new app idea for helping create lifestyle health wellness changes - “pay for prevention”.

If anyone is interested in developing in this area connect up with me; I'd be interested in hearing from you.

We are a team of two and have some prototype code. donna (at) genuus (dot) com