There appear to be a couple sizable gaps in the logs indicating the server was unreachable - one for about 10 minutes and one for about 35 minutes - during the previous hour (1630-1730 CST). The server wasn't actually down, so I suspect network problems on the part of our provider. If you can read this, they ain't happening right now. ;-)
I have no idea what to do when the load exceeds the server, which is happening. I'm restarting the apache process every now and then when it seems locked. Ugh. This is when I wish I knew as much about this shit as Adam does.