Evidently Natty doesn't like a CLI install (from the 11.04 Alternate install disc). It refuses to boot! Let's hope the Netboot installation works.
Update: As dpeter pointed out, the CLI install fails to work inside the testing environment (as well as older machines). Until this is ironed out, I can't really work on the project effectively.
Le Second Update: esauvisky pointed out that tty switching still works. I hate to do it, but I guess I have to make the user handle tty switching in order to get to the script until this bug is fixed. Thanks, mate!
Update the Third: Installing GNOME forces the install of Unity. This needs to stop happening. I'm not even sure why, because none of the dependency trees map out that way. I think the default install of GDM is designed to kick to Unity, even when it's not even installed.
Update4: Or not! It's just stupid and gives me the standard "your hardware can't run Unity" message, despite Unity not being installed at all.