If your legs just refuse to budge (and your arms aren't much help either) an electric trike might be fun. This website has buying advice, manufacturers, and all sorts of info on e-trikes.
Wise Buying Advice (from electric-bikes.com)
1. Make sure the bike fits you. An e-bike is still a bike.
The better the fit, the more you pedal, the longer
your range, and the happier you are.
2. Put your e-bike needs in writing. Speed, range, and
which hills to climb - with specifics.
3. Never buy solely based on price unless you are an expert on
e-bikes. Pay a little too much for the right product and cry once.
Get a good deal on the wrong product and cry every day.
http://www.electric-bikes.com/trikes/index.html
Wise Buying Advice (from electric-bikes.com)
1. Make sure the bike fits you. An e-bike is still a bike.
The better the fit, the more you pedal, the longer
your range, and the happier you are.
2. Put your e-bike needs in writing. Speed, range, and
which hills to climb - with specifics.
3. Never buy solely based on price unless you are an expert on
e-bikes. Pay a little too much for the right product and cry once.
Get a good deal on the wrong product and cry every day.
http://www.electric-bikes.com/trikes/index.html