Hi Wooz,
I don't know specifics about the Endian Mini appliance, but I'd venture a guess that like
many firewall/security products, it's built on a standard PC architecture (just a lot smaller and without all the adapters such as VGA, PS2 etc...).
The firewall appliance I installed Endian on was a small version of a large version of a well known, European based, niche firewall supplier. After the maintenance and support was over we thought we'd have a look inside the unit, and it was just a standard 486 PC with a NANO drive. All the connectors for VGA, IDE, PS2, USB etc, were inside the unit and all we had to was a VGA block adapter to VGA. The rest we found lying around in various bit boxes we had.
Plug in keyboard via USB, plugged in a monitor via the block adapter, IDE CD-ROM, and we had a BIOS screen
We found that the hardware wasn't up to supporting all our users (500+), and insted use Endian on VM, but I dare say for a smaller office or a home user it would have been perfect.
If you're a little bit technical I dare say it's not that difficult, open it up and have a look! As I said I would be very interested to know how you get on
Gyp