I've noticed it gets funkier and funkier as it runs. I suspect there is something wrong with the section where I check to make sure it isn't a repeat message.
Concept: I snag the poster and comment from the line, then check to see if that key exists in the hash referenced by $oldmessages (basically using the hash as an easy lookup). If it isn't there, I drop it into $newmessages and print it out. Once I've gone through the page, I undef $oldmessages, and recreate it to point at $newmessages. Are there problems with this?
And yes, I realize that any nodelet that mentions "Chatterbox" will screw this program. Not sure how to fix that without break theme independance.