Creating a "Rules Wizard"

Hi -- I'm kicking around an idea that will require the administrator of a message board to use an Outlook-like "Rules Wizard" to create filters that respond differently to visitor input. Y'know, letting board moderators create filters like "if [AUTHOR] contains 'BARNEY' and [CONTENT] contains 'hooked up with WILMA' then send mail to 'FRED'" ... etc. etc. It's easy enough to hard-code this sort of regex ... but the notion of making a create-on-the-fly tool for this kind of thing is scrambling my brain a bit at the moment. Can anyone refer me to a code sample that does something like this? Thanks in advance, -Clay -- cloveless@eruptor.com