I have talked about the cool Withings WiFi Connected Body Scale before. The scale is able to check your weight and BMI and can be set up to tweet he results or just send them to your PC or an available iPhone app.
The cool Withings scale has been updated and can now interface with Microsoft HealthVault. That means that you can store your weight readings and BMI calculations in the Microsoft online health records database. This is an easy way to share your weights and weight loss progress with your doctor or other care provider.
The scale uploads the readings and measurements directly to HealthVault and needs no interaction from the user to perform the upload. All the user needs to do is step and the scale and let it take its measurements. The Withings scale is available now for $159.