1st impressions of your plugin are very good. I did some quick testing and it seems to work very well, easy to setup with minimal configuration.
I did have one issue though... I run the Bad Behaviour plugin which seemed to have an issue with DB Cache Reloaded - an error message about header already loaded in db.php.
One other thing - for some reasons stats were not being displayed at the bottom of my footer. Does your plugin differentiate between users logged in and general public?
Hope to see your plugin gather support and momentum.