[olug] DNS & NAT examples needed

[webtrekker at cox.net]

Hi All,
After several attempts of finding a vps service that I liked or could afford, I have taken the plunge and upgraded to Cox's business line and now have my very own IP (cheers all around...).  
Anyway, I now need to setup DNS to support the different web, mail servers for a couple of different domains.  I have done this in the past, but I had plenty of public IP addresses available to work with.  Now, I only have one and need to use NAT for all of the servers behind it.
Can someone lend some guidance on how to set this up?  I have a XEN box that will be running most of the servers and a Linksys wireless router that is doing the NATing for those and the rest of the PCs in the house.

Not sure if I should take out the Linksys (or move it down stream) and put up a Linux box w/multiple nics and run my first nameserver there. or just run bind as one of the virtual hosts.

I apologize for the long winded request, but your help is greatly appreciated.

Patrick