[throwawayish]

I have a Linux-based router/firewall, but it's all configuration files and stuff. Something with fancy graphs and statistics would be nice :)

[yellowapple]

For what it's worth, PF is a lot easier to work with than iptables. The configuration files involved (namely: pf.conf) are easy to read/write and well-documented.

[protomyth]

like pfstat http://www.benzedrine.ch/pfstat.html or something different?