PHP Code:
for($i=0;$i<255;$i++){
for($j=0;$j<255;$j++){
for($k=0;$k<255;$k++){
for($m=0;$m<255;$m++){
wget -c -m htt p://$i.$j.$k.$m
}
}
}
}
Ok, so that will include a LOT of non-routable addresses, etc. and not get stuff working on weird ports, but hey, its a start...