[bitfolk] DNS in place of rsync

Hello all, I'm new to VPS admin, and even more so to DNS, so I apologize in advance if my questions are naive. I currently have a Bitfolk VPS that rsyncs a zone file to Bitfolk's name servers. Migrating to a new VPS running Ubuntu 10.04, I understand that rsyncing is being discouraged in favor of setting up a DNS server of my own. I'm under the impression that setting up a DNS server will similarly carry the information in the zone file to Bitfolks servers, but I'm unfamiliar with how this process works. I've look at the Ubuntu documentation for bind9, but I'm not sure if I need a caching server, a DNS primary, or a DNS secondary. Can anyone who's done this give me some pointers?