Set up a local DNS server to catch all requests to a specific tld to your local machine (osx lion)

osxdns.sh

#! /bin/bash

# USAGE: sudo ./osxdns.sh tld

# Templates
namedconf='include "/etc/rndc.key"; 
controls {
	inet 127.0.0.1 port 54 allow {any;}
	keys { "rndc-key"; };
};
options {
	directory "/var/named";
};
zone "." IN {
	type hint;
	file "named.ca";
};
zone "localhost" IN {
	type master;
	file "localhost.zone";
	allow-update { none; };
};
zone "0.0.127.in-addr.arpa" IN {
	type master;
	file "named.local";
	allow-update { none; };
};
zone "{TLD}" IN {
    type master;
    file "{TLD}.zone";
    allow-update { none; };
};
logging {
        category default {
                _default_log;
        };

        channel _default_log  {
                file "/Library/Logs/named.log";
                severity info;
                print-time yes;
        };
};'

zoneconf='$TTL  60
$ORIGIN {TLD}.
@      1D IN SOA  localhost. root.localhost. (
          45 ; serial (d. adams)
          3H ; refresh
         15M ; retry
          1W ; expiry
          1D ) ; minimum

      1D IN NS localhost.
      1D IN A  127.0.0.1

*.{TLD}. 60 IN A 127.0.0.1
'

# Script
echo "Creating configuration files for $1":
echo "$namedconf" |sed "s/{TLD}/$1/g" > /etc/named.conf
echo "$zoneconf" |sed "s/{TLD}/$1/g" > /var/named/$1.zone
rndc-confgen > /etc/rndc.conf
head -n5 /etc/rndc.conf |tail -n4 > /etc/rndc.key
echo "OK"

echo "Checking configuration:"
named-checkconf /etc/named.conf
named-checkzone $1 /var/named/$1.zone

echo "Setting up autostart:"
launchctl load -w /System/Library/LaunchDaemons/org.isc.named.plist
/usr/sbin/named
echo "OK"

echo "Setup complete, now just add '127.0.0.1'"
echo "as a DNS server to your network adapter."
echo "Have fun!"