Summary: Plan 9 doesn't boot after a seemingly successful install.
Details: After booting and playing around on the live CD for a bit, I decided to give the installation a whirl. A couple entries of "i/o error" in the device detection step kept me from advancing in the installation. I tried restarting the installation process with DMA off and I successfully cleared the device detection with no problems.
The rest of the installation went smooth: deleted the one and only partition, added a new partition (on sdC0), set the partition type to "PLAN9", had it subdivided according to the default config, installed files from the dist, and had the installer make a Plan 9 boot file for me. After finishing the install, I rebooted and set the C drive as the first priority boot device. From here, I expected that the machine would just boot right into Plan 9 since I had set is as a plan9 boot config.
Instead, I got a screen that looked similar to the screen I got when my CD-ROM drive was set as secondary slave (this was before all this, obviously):
