Improvements
I made some changes to the graphing system, including changes in the calculations as well as the display of the graph.
I found out that some people were being driven away because they thought I was stealing passwords, so now a new password-free option is available to anybody that wants to sign up.
You can now view a list of all the users so you can find out how others are doing compared to you. Also you can link to users directly by adding ?user= to the end of a URL.
http://zonestats.cjb.net?user=fexii
Credits go to Zelph for the password and user list ideas