Trying to be a good sysadmin, I want to keep on top of security updates and patches (particularly those that could affect this website or my mail server). To this end, I updated the webserver in use apache. This reset some options in the webserver config that caused a s-t-r-a-n-g-e recursion error relating to the Gallery 2 Module.
I finally tracked it down and apologize for any inconvenience this extended outage caused. Henceforth, let me just create a permanent policy that this site will be down possibly every Saturday morning from 2:00 am-4:00am. I will attempt to wait to apply updates until then, but I will apply any critical security updates as soon as possible. I have two servers, so I will attempt to setup a failover system to further reduce outages.