Andy tracked down the problem earlier today: bum power supply.
It wasn’t putting out 12V on the dedicated line to the Sounds Good board.

Quick swap with a Peter Chou and viola! My Xenophobe has sound.

Now to source out the triggers and joystick bolts. Anyone know if this
is the same beastie?

http://www.happcontrols.com/joysticks/50997000.htm

I know that Xenophobe is leaf switches, and this uses micros. If the
trigger is the same that would be fantastic. If I can use the screws
that hold it together, that would be even sweeter.