Several people have asked about my wheelchair and camera rig, so here is all the pertinent info.
My wheelchair is a Quantum Rehab Q6000Z, made by Pride Mobility. As you can tell from the videos, the chair is quite rugged, and I have the "high-speed package" installed, which brings the top speed to 8.5 mph, up from the normal top speed of 6.5 mph.
The camera I'm using is a Canon SX10 IS. It's a still camera that shoots "good enough" videos. This camera allows me to take both still photographs and videos, thereby killing two birds with one stone. As you can see from the photos, below, when the camera is mounted to the wheelchair it is not at eye level, so it was important to get a camera that had a flip out viewscreen, which this Canon does.. Without this kind of a flexible screen, it would be almost impossible for me to frame shots. The camera also has an extremely long zoom range (20X), which is important because of the various restrictions that shooting from a wheelchair presents.
The camera is mounted to the chair via a Gorillapod SLR flexible tripod, on which I've mounted a Manfrotto 482 micro tripod head. The Gorillapod does not have a flexible head, meaning that the camera would be stuck in one position without the additional tripod head. The little Manfrotto head fixes that problem.
Here are some photos of the rig. Please forgive the image quality, I had to use my crappy cell phone camera to take them. Click for larger images...