Long time no see... :-)
Anyways... another example of the high customizability of linux. I wanted to set up a custom firewall rule on my computer that would block all requests to port 80 of any server that is outside the campus. Just a one command job. Iptables is an excellent packet filtering tool with several updates over it's old cousin (or should I say ancestor) ipchains.
Here's a link which would give a lot of info about iptables.
BTW, another spoof on google.com. Check out googirl.com.ar :-)