I made changes to the DNS servers for these domains:

wikibook.com wikibooks.com wikibooks.org

wikisource.com wikisource.org

Zwinger is the primary, gunther.bomis.com is a slave to zwinger. The zone files are /var/named/master/wikibooks.zone and wikisource.zone

As I understand it, there are several other domains that should have DNS set up on Zwinger and Gunther...