Best way to run Bind on public DNS servers??

[Kaya Saman]

Sorry, just to mention in addition that I currently run a master/slave 
configuration for internal DNS queries within the NAT! Since the current 
location of servers has only one static IP available I have only exposed 
one of the servers to the web but in the new location I plan to get as 
many IP addresses as needed so that each one of my servers has it's own 
public IP!