I just came across this thread. I was stuck in a wheel chair for about 3-4 months after a motorcycle accident I had back in '02. Be sure to get yourself one of those light weight chairs. They wheelie real good! I decided since I was stuck in the chair for awhile to finally learn how to do wheelies.
It was always fun to ride a constant wheelie when I'd go grocery shopping with my mom and/or my (at the time) future wife! The looks you get are almost as enjoyable as the ones when you lift up a front wheel cruising down the road!