I created a quick script to go through the syslogs of a firewall (or 2,3,4,5) and create a deny report. As you can imagine, its uses are almost endless. I might work on it to make it better at some point.

#!/usr/bin/perl
#
# Version 0.1
# Parse PIX syslog for denies and create report
# Last Modified 2007-10-17 RDG
 
use [...]