Extreme Clean has been built with easy extension in mind, from within the Extreme Clean package, or through third party packages and site specific cleaners.
Each cleaner is implemented through a plugin architecture for easy extension. By following this plugin architecture, additional cleaners can be implemented to work seamlessly with both the dashboard Clean Now and the Extreme Clean job/task.
As time permits and requirements arise, I plan to add further cleaners.
Let me know of your site cleaning needs. PM me via concrete5.org.
I can offer free advice if you want to integrate further cleaners from your own packages.