We're currently investigating into what took our host 11 hours to get the box back up and running. Again, this wasn't limited to ZFGC, this time around (most of the 'little down times' are a result of high load.
From my poking around, everything worked, aside from Apache, which most likely crashed. Apparently, no one else on the pass72 box took notice of it for around six to eight hours in, (I was sleeping at the time) when I finally put a ticket in complaining about it. After about a three hour wait I finally got a reply from support, they 'noticed nothing wrong with it'. I pointed out, tracerts and pings work, but apache is unresponsive.
On August 29th a switch was replaced early morning EST, I don't think this is in relation to the issue, but that does explain a two hour downtime early EST.