I have a hardware firewall/router but no software A/V or firewall active... probably should, but nothing's happened so far.  I keep up with updates as soon as they're released, so the worm hasn't affected the computers on my LAN, and never will. :)

I have an ICS box which shares the connection to the rest of my lan. The box was unfortunatly running XP and it got hit, however, the worm did not propagate to the rest of my LAN, was quickly noticed and removed.