Windows 200x AD DC's do not require that the DNS master is on a WIn 2003 
AD server.   You need a BIND9 compatible server with dynamic updates 
preferably enabled.   If dynamic updates are not enabled then when a 
Windows machine joins the DC it will dump out DNS records that need to 
be added to the DNS master.
As long as the Samba4 DNS server support dynamic updates it should work 
fine for supporting other domains.
On 12/13/12 13:56, Adam Tauno Williams wrote:> Has anyone been able to migrate DNS from a Samba4 DC to a Windows 200x 
> server?
>
> I've looked around the wiki, etc... and haven't found any
pertaining
> to moving DNS between platforms.
>