What I would use:

@       SOA     wa4phy.net. root.wa4phy.net. (
                 2005122901      ; Serial, todays date + todays serial #
                 8H              ; Refresh, seconds
                 2H              ; retry, seconds
                 1W              ; expire, seconds
                 1D )            ; minimum, seconds
@       NS      ns
         NS      ns2
         NS      ns3

ns      A       216.104.158.222
ns2     A       216.104.128.37
ns3     A       216.104.128.38

@       A       216.104.158.222
vortex  A       216.104.158.222
@       MX      10 wa4phy.net.  ;Primary Mail Exchanger
         MX      20 smtp7.bagger.usbn.net. ;Secondary MX
www     CNAME   wa4phy.net.
ftp     CNAME   wa4phy.net.

'IN' can be dropped - it's the default.
Please note the lack of an entry for localhost, localhost. would need to 
go into a seperate zone file (for the localhost. domain) or leave it up 
to /etc/hosts to resolve localhost.

Cheers,
MaZe.