If not already implemented..
Cache Deletion
Provide a way for users to be able to delete a certain file, specified by a URL, or the entire website from the cache with just the domain name.
Examples
forum.wingate.com/styles/prosilver/imageset/qbik_logo.gif | Only deletes the gif
forum.wingate.com/* | Deletes all saved files for this domain name
*.wingate.com | Deletes all files from every single domain name. This would also affect websites that have no sub-domains i.e. wingate.com
Thanks,
Talicada