Pedals for your PC (but not for gaming)

Kris_J writes "Bilbo Innovations produce a set of pedals that plug in between your keyboard and PC. They are used to emulate keystrokes - the default is CTRL, ALT & SHIFT, but they'll do lots more than that. " Maybe its just my aching wrists, but I'm beginning to wonder more and more about things like this. Are pedals a good idea for ergonomics? Anyone tried it? Will it work under Linux?