I’ll be drawing up a diagram either tonight or tomorrow, or when I’m done with the network, but essentially what I am going to do is build a pfSense box out of the old P3 550 box, and run two switches on two separate NICs which will be appropriately designated in the software so there is as little chance as possible of crossover.

If you run a Wordpress blog and haven’t removed the code in footer.php which displays the version of wordpress you’re on, I would suggest doing so.  It’s a little security by obscurity-ish, but it’s one more small barrier against common vulnerabilities you may be passed over on if the attacker doesn’t know what version you’re on.