I've been using my left hand for the pointing device ever since I got this problem, and I recommend that layout to everyone. This was the first thing the Health and Safety guy at work suggested and it makes a major difference to comfort. Unfortunately it makes pointer aiming worse; even after 6 months I'm not as a accurate with my left hand as my right.
Even on the left side, I can't use a mouse properly - I can't form my hands into the normal shape to hold a mouse, with wrist pointing down, middle fingers stretched and thumb/pinky bent inward. I can use special vertical mice or trackballs, but if forced to use a normal mouse I have to rest my hand on top in a loose fist to push it around.

I have athralgia which prevents me from using a mouse. I rely heavily on keyboard shortcuts but use a trackball as a pointing device. I often find GUI buttons are too small and easily overshot - and the worst offenders often have dialogs without any support for keyboard shortcuts. InfraActive comes to mind - they even removed keyboard shortcuts between versions 7 and 8. Button scaling in many apps breaks the layout, or doesn't even work. While this is a interesting and useful development, I don't see anything changing soon on the disability usability front. There is existing support in common OSs for making global UI changes, but most apps ignore/override these settings or just break horribly because the UI developer didn't design the interface to adapt to these sort of changes.

At first glance I thought these used actual Tesla coils in the processor, or the devices were at least powered or cooled by some apparatus that used Tesla coils.

Turns out "Tesla" is just the name of the product.

Drat. I demand a refund.