Arrgh! :( Just this week I needed to do some emergency rearranging of personal infrastructure, and moved one nameserver to Linode Fremont, while the other nameserver is in Linode Dallas. I was fully aware that I needed a more diverse long-term solution, but I figured "What are the chances that both Fremont and Dallas will go down in the next week or two?"
Sorry, folks. I hate that my dangerous flirting with Murphy's Law is hurting other people.
For whatever it's worth, since it was a DHCP problem, I was able to manually configure the static IPs and get the hosts back up. The last incoming connections logged before the outage were around ~ 6:24:00 am MDT (about one hour ago). I guess that's when my server needed to renew the DHCP lease and couldn't.
Sorry, folks. I hate that my dangerous flirting with Murphy's Law is hurting other people.