First, a little background...
Many of us like OpenDNS because you can configure it to *not* present a help page when trying to connect to a non-existent domain name. Earthlink's DNS, for example, will resolve non-existent domain names so that they can direct you to a help page.
This really sucks if you need to be sure a domain name is good or not.
Anyway, the easiest, cleanest way to work around this in Kamikaze:
Create a file called /etc/resolv.conf.opendns
in that file, put:
nameserver 208.67.222.222
nameserver 208.67.220.220
Now, in /etc/dnsmasq.conf, change the line:
resolv-file=/tmp/resolv.conf.auto
to
resolv-file=/etc/resolv.conf.opendns
...and reboot.
This will work for anytime you need to *not* use the DNS servers provided by your ISP.
Enjoy!