Congrats on your project, looks great!
I use Rails behind Apache. Have you thought about an api that would enable the stats to be added to your system?
In other words, a specification for what to store in mysql per web page request?
Or a related idea, pulling stats from the MySQL logging tables that Apache can use instead of having the application store into mysql?
Advantages: Would work with any website hosted on Apache server.
Thanks for your thoughts...