I don't think a crontab will cut it. I'm on my own dedi. A simple "rm" with verbose on the simpletags dir showed thousands of files being deleted every minute and it lasted around 30-45 minutes to complete.
I disabled the default wordpress cache in wp-config and now my server is running stable. Before, apache would generate an insane amount of processes before crippling the server.
Is this a wordpress object cache issue or a simpletags wordpress caching issue?
(WordPress also had huge amounts of cache files, but not as many as simpletags which would generate thousands in seconds.)