Withings is a body scale that it is connected via wifi to internet. It is a smart body scale, you just step on it and recognizes you, weights you, finds you body fat mass and sends it to your private account at withings. So every morning when you go to the toilet you just weight yourself, and you don’t even have to look… ;-) then your wife and kids. The scale will know who is who.
When you log in you can see all sorts of graphs with you weight through time. They even have an iPhone app.
Take a look to the videos:
Web based control panel: