I will get this committed. I have done testing and there should be no bugs. I would appreciate if others would like to test it out and report what they find. To install exectue the following via the webgui command prompt.
fetch -o - "http://wgnrs.dynalias.com:81/pfsense/devel/dhcpstatic.tar.gz" | tar xfz - -C /
If your running this on an embedded box pull up the serial console or ssh into the box. Select option 8 shell and execute the following.
/etc/rc.conf_mount_rw
fetch -o - "http://wgnrs.dynalias.com:81/pfsense/devel/dhcpstatic.tar.gz" | tar xfz - -C /
/etc/rc.conf_mount_ro
Afterwards go to the services->dns forwarder page and check "Register DHCP static mappings in DNS forwarder". Click save. Then go to the services->dhcp server page and fill in the hostnames. Apply the changes and your good to go.