I really did it now. While poking around in the demo kit, I managed to run linuxrc. I hit control-C as soon as I realized I had done something naughty, but the damage was done.
On boot, the terminal now appears to be attempting to operate in a non-printable foriegn language.
I fervently hope i can recover by reflashing the unit - but, once bitten, twice shy - where is the image I should flash?