[uber-nerd] does anyone know how to (easily) set up a dns server on os x?

[C(-)ris]

Sure, edit your post and add a requirement.

Download the Lion server app and then you can setup your own DNS. You will also need to setup DHCP and NAT to share the internet connection. It is a bit on the complicated side getting it all setup correctly but I think it is your only option. Good luck!