Foot switch fever.

Savant Elite USB Foot Switches. $149.00. Cue vision of rows of MegaCorp Inc cubicles containing happy tap dancing workers.

While factory programmed for mouse button emulation, it can be easily reprogrammed on a Windows PC to perform any keyboard action or key combination. Through extensive user testing, proper spacing and orientation of each pedal was determined to maximize comfort and productivity. Furthermore, the outer pedals may be adjusted inward to accommodate smaller feet.

Now that could help mousing with RSI ...