This is just a quick django app I threw together one weekend after studying the google visualization API at PBS. All it does is track weight points overtime. It's multi user so if you want to track your own weight feel free to sign up.
No, by default all accounts created with the privacy switch on, which means that only you logged in as yourself can view your chart. There is a way to make it public, like I have with mine. Just log on and go to preferences
drop me a line at teebes at teebes dot com