An appliance :) It might be a completely worthless idea, but I would consider offering a "USB Stick" version rather than an appliance. It is much easier to rep

An appliance :) It might be a completely worthless idea, but I would consider offering a "USB Stick" version rather than an appliance. It is much easier to replace, costs close to nothing, yet it can still be implemented as a self-contained blackbox with no customer serviceable parts.