WordPress.org

Monitors your WordPress installation for added/deleted/changed files. When a change is detected an email alert can be sent to a specified address.

Features

• Monitors file system for added/deleted/changed files
• Sends email when a change is detected
• Multiple email formats for alerts
• Administration area alert to notify you of changes in case email is not received
• Ability to monitor files for changes based on file hash or timestamp
• Ability to exclude directories from scan (for instance if you use a cacheing system that stores its files within the monitored zone)
• Site URL included in notification email in case plugin is in use on multiple sites

Sorry for the delayed release for working with WordPress 3.0. NOTE I haven't tested the latest version with multi-site yet, only single site.