Foot Mouse
From: Rehab Managemant - Rehab Today

Bili Inc, City of Industry, CA offers its Footime foot mouse, which allows
people with upper limb challenges to use a computer by foot. The
foot-controlled mouse with programmable buttons (for shortcuts) speeds up
workflow and reduces repetitive hand/eye movement between hand input devices.
The foot mouse is a two-part device. The "slipper" with cursor controller
(pointer) is worn and controlled by one foot and can move around on a big
mouse mat as a "hand" mouse does. The pedal, with five buttons, mouse clicks,
defined shortcuts, and a scroll roller, is controlled by the other foot.  

A roller turning left/right scrolls the screen up/down, while the heel rests
on the floor comfortably. A side switch allows the user to choose between two
states; one state includes all the mouse clicks; the other state includes all
five buttons for programming. The software allows each definable button to be
defined with two sets of functions, giving the user up to 10 shortcuts
(functions) for each program. 

From:
http://www.rehabpub.com/RMN/2008-06-16_08.asp

Links:
Bili Inc.
http://www.bilila.com

Foot Mouse
http://www.bilila.com/foot_mouse_slipper_mouse