Something that is not a wheelchair is the Genny.
I used to work there in IT Dep. many years ago and still i think is the only real useful application of a Segway.
And the best part it doesnt't look like a fucking wheelchair, when i was trying it many people stopped me and ask if they could try it.
luckly for me, I'm not paraplegic so they had a ride.
The only const: Is not that cheap, 20K Euro.
But if don't live in a retarded country (yes US, I'm talking about you) the biggest part is on the state