Thanks for the suggestion, I've been looking at Sawmill, have you actually used it before? I wasn't sure if it was meant mostly for diagnosing webservers or firewall logs.

I've been doing some research while at work, and found these as well

30 Day Trial, nice PIX and Netscreen Reports (cheap)
http://www.eventid.net/firegen/
Freeware, but the reports are cheesy, not bad for personal log analysis though.
http://www.sonic.net/wallwatcher/
Free software, works on PIX, Netscreen and Firewall-1 …Shell script Linux/Unix
http://tud.at/programm/fwanalog/

Havn't had time to try the trials on these yet to see if they cover my needs. I'm doing log analysis on over 50 PIX's, 15 Netscreens and 40 Checkpoints.