redundant servers

[RYAN vAN GINNEKEN]

ok i run freebsd 4.8 and bind9 i am using the views feature which works 
excellently. 
I own two domains say for example domain1.ca and domain2.ca for now i 
only have one server.  in order to host the two domains what do i need 
to do with bind add another zone ??.

Also soon i will have two servers at different locations i.e. different 
ip addresses and would like to host both domains from it as well so that 
if one server losses it ip address the other server will still run 
everything is this possible.