Is this actually serious? I would actually really love that. Would save so much strain on my fingers and it would probably even give my legs a bit of a workout.
It's serious. Unfortunately I find it very difficult to use. The foot just isn't as flexible as the fingers. It's slow and cumbersome. Also, using it limits how much I can move around in/with my chair.
I tried to get used to it, but my foot pedal is just collecting dust under the desk now.
It's a shame the modifiers (shift included) like to get stuck on the Kinesis. Expensive pile of crap...
If I had the money, I'd try out the Maltron 3D keyboard. I haven't heard about such problems with it. It also comes with a numpad in the middle, which I kinda miss in the Kinesis. It would be great for nethack, and something else.