Actually, I looked through the code, and even through I'm brand new to PHP I was able to figure out the routines I needed here and there. I did a little cut & paste of Rick's code, modified at my own peril, and I now have a working version of addnewpost.php that sends an email notification to the moderators of a forum whenever a post is made.
It's not exactly a real "hack", since I didn't write anything new, but if anyone wants it, let me know. It's a single code block that gets pasted in, no other changes.

Maybe now I'll go about trying to make it configurable in the Admin section.
Helice --
http://forum.foolmoon.com