Yeah, so I decided to install the 64 bit Ubuntu 7.10 server into a VirtualBox virtual machine.
Turns out, VB still doesn't support 64 bit guest OS's.
So, I downloaded the 32 bit Ubuntu 7.10 server. After three times of giving up when the install was installing the kernel because it froze, so I downloaded the 'Alternate Install CD'. That didn't work any better.