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.
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.