Yeah, I took care of the uCode problem. When I used Asus' tool to update the BIOS the first time, I chose to update it from the Internet. It downloaded and flashed version 601. The current version is actually 1002. So I downloaded it and flashed it manually.
I wonder if I'll be able to overclock it at all. My RAM is DDR2 800 with 4-4-4-12 timings. I checked, and the BIOS had it set at 5-5-5-15 so I changed it to 4-4-4-12. Well, it wouldn't boot. It showed the Asus splash screen, but I couldn't access the BIOS or anything. The optical mouse's light never came on and the keyboard wouldn't respond. I had to clear the CMOS. Right now everything is set at its default except that I turned off the JMicron IDE controller.
It's weird to have a system where I used zero molex power connectors and zero IDE connectors. Everything is SATA. I wish my PSU had modular wires. I have these two absolutely huge bundles of unused wires just folded up at the bottom of my case. I wish I could remove them.
The system isn't silent, but it's a whole lot quieter than my old one. I'm really, really happy with the results.