You guys are taking wrong approach to this......
The iPhone can be used for a scale using the....."G-sensor"
We have that too! Lets port that app to the pro/diamond/all G sensor WM devices!
Heres what I am talking about and it works Great on my iPhone
http://www.iPhoneScale.com/
and youtube video of it in action:
http://www.youtube.com/watch?v=QnaPVEcVzLg
Any takers?